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1 #include <stdio.h> |
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2 #include <stdlib.h> |
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3 #include <string.h> |
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4 #include <math.h> |
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5 #include "netcdf.h" |
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6 |
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7 /* |
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8 * Loop through all history tapes from the Community Land Model adding new |
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9 * fields that are totals of the multi-level fields included in total_vars[] |
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10 * below. |
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11 */ |
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12 |
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13 static char *total_vars[] = { |
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14 "SOILICE", |
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15 "SOILLIQ" |
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16 }; |
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17 static int nmtotal_vars = sizeof(total_vars)/sizeof(*total_vars); |
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18 static char *combo_vars[] = { |
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19 "LATENT", /* FCTR + FCEV + FGEV */ |
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20 "ET", /* QVEGE + QVEGT + QSOIL */ |
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21 "ALL_SKY_ALBEDO", /* FSR / FSDS */ |
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22 "BLACK_SKY_ALBEDO", /* (FSRNDLN + FSRVDLN)/(FSDSNDLN + FSDSVDLN) */ |
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23 "NETRAD", /* FSA - FIRA */ |
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24 }; |
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25 static char *combo_long_names[] = { |
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26 "latent heat flux", |
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27 "evapotranspiration", |
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28 "surface all-sky albedo", |
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29 "surface black-sky albedo", |
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30 "net radiation" |
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31 }; |
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32 static char *combo_units[] = { |
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33 "watt/m^2", |
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34 "m/s", |
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35 "unitless", |
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36 "unitless", |
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37 "watt/m^2" |
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38 }; |
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39 static float combo_FillValues[] = { |
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40 1.e+36, |
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41 1.e+36, |
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42 1.e+36, |
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43 1.e+36, |
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44 1.e+36 |
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45 }; |
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46 static int nmcombo_vars = sizeof(combo_vars)/sizeof(*combo_vars); |
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47 static char *varname_total_prefix = "TOTAL_", *longname_total_prefix = "total "; |
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48 static char *time_name = "time", *lon_name = "lon", *lat_name = "lat"; |
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49 static char *long_name_name = "long_name", *units_name = "units", |
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50 *cell_method_name = "cell_method", *FillValue_name = "_FillValue", |
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51 *missing_value_name = "missing_value"; |
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52 static char *cell_method = "time: mean"; |
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53 |
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54 void wrap_nc(int status) |
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55 { |
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56 if (status != NC_NOERR) { |
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57 fprintf(stderr, "netCDF error: %s\n", nc_strerror(status)); |
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58 exit(1); |
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59 } |
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60 |
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61 return; |
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62 } |
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63 |
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64 void read_total_timeslice(int ncid, int varid, size_t nlevels, size_t d1, |
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65 size_t d2, char FillFlag, float FillValue, size_t tslice, float *var, |
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66 double *tvar) |
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67 { |
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68 int i, j; |
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69 size_t start[NC_MAX_VAR_DIMS], count[NC_MAX_VAR_DIMS]; |
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70 |
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71 /* Initialize tvar to FillValue */ |
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72 for (i = 0; i < (d1 * d2); i++) |
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73 tvar[i] = (double)FillValue; |
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74 |
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75 |
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76 start[0] = tslice; |
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77 count[0] = 1; |
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78 start[2] = 0; |
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79 count[2] = d1; |
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80 start[3] = 0; |
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81 count[3] = d2; |
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82 |
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83 /* March through the levels, totalling as we go */ |
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84 for (j = 0; j < nlevels; j++) { |
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85 start[1] = j; |
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86 count[1] = 1; |
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87 wrap_nc(nc_get_vara_float(ncid, varid, start, count, var)); |
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88 for (i = 0; i < (d1 * d2); i++) { |
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89 if (tvar[i] == (double)FillValue) |
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90 tvar[i] = (double)var[i]; |
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91 else |
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92 tvar[i] += (double)var[i]; |
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93 } |
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94 } |
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95 |
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96 return; |
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97 } |
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98 |
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99 void alloc_svars(size_t nsvars, size_t d1, size_t d2, float ***svarsp) |
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100 { |
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101 int i; |
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102 float **svars; |
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103 |
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104 if (!(*svarsp = (float **)malloc(nsvars * sizeof(float **)))) { |
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105 perror("alloc_svars:svarsp"); |
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106 exit(2); |
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107 } |
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108 svars = *svarsp; |
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109 for (i = 0; i < nsvars; i++) { |
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110 if (!(svars[i] = (float *)malloc(d1 * d2 * sizeof(float)))) { |
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111 perror("alloc_svars:svars[i]"); |
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112 exit(2); |
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113 } |
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114 } |
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115 return; |
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116 } |
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117 |
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118 void free_svars(size_t nsvars, float **svars) |
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119 { |
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120 int i; |
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121 |
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122 for (i = 0; i < nsvars; i++) |
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123 free(svars[i]); |
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124 free(svars); |
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125 return; |
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126 } |
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127 |
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128 void read_timeslice(int ncid, size_t d1, size_t d2, size_t tslice, char *name, |
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129 float *var) |
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130 { |
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131 int varid; |
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132 size_t start[NC_MAX_VAR_DIMS], count[NC_MAX_VAR_DIMS]; |
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133 |
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134 start[0] = tslice; |
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135 count[0] = 1; |
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136 start[1] = 0; |
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137 count[1] = d1; |
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138 start[2] = 0; |
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139 count[2] = d2; |
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140 |
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141 /* Get variable id */ |
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142 wrap_nc(nc_inq_varid(ncid, name, &varid)); |
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143 /* Assume the correct size and read the variable */ |
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144 wrap_nc(nc_get_vara_float(ncid, varid, start, count, var)); |
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145 |
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146 return; |
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147 } |
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148 |
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149 void read_compute_timeslice(int ncid, size_t d1, size_t d2, size_t tslice, |
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150 int num, double *tvar) |
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151 { |
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152 int i; |
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153 size_t nsvars; |
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154 float **svars; /* source variables */ |
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155 double denom; |
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156 |
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157 /* Initialize tvar to FillValue */ |
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158 for (i = 0; i < (d1 * d2); i++) |
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159 tvar[i] = (double)combo_FillValues[num]; |
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160 |
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161 switch (num) { |
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162 case 0: /* LATENT */ |
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163 nsvars = 3; |
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164 alloc_svars(nsvars, d1, d2, &svars); |
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165 /* read timeslices */ |
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166 read_timeslice(ncid, d1, d2, tslice, "FCTR", svars[0]); |
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167 read_timeslice(ncid, d1, d2, tslice, "FCEV", svars[1]); |
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168 read_timeslice(ncid, d1, d2, tslice, "FGEV", svars[2]); |
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169 /* compute new variable */ |
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170 for (i = 0; i < (d1 * d2); i++) { |
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171 if (svars[0][i] != combo_FillValues[num] && |
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172 svars[1][i] != combo_FillValues[num] && |
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173 svars[2][i] != combo_FillValues[num]) { |
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174 tvar[i] = (double)svars[0][i] |
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175 + (double)svars[1][i] |
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176 + (double)svars[2][i]; |
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177 } |
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178 } |
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179 free_svars(nsvars, svars); |
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180 break; |
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181 case 1: /* ET */ |
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182 nsvars = 3; |
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183 alloc_svars(nsvars, d1, d2, &svars); |
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184 /* read timeslices */ |
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185 read_timeslice(ncid, d1, d2, tslice, "QVEGE", svars[0]); |
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186 read_timeslice(ncid, d1, d2, tslice, "QVEGT", svars[1]); |
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187 read_timeslice(ncid, d1, d2, tslice, "QSOIL", svars[2]); |
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188 /* compute new variable */ |
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189 for (i = 0; i < (d1 * d2); i++) { |
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190 if (svars[0][i] != combo_FillValues[num] && |
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191 svars[1][i] != combo_FillValues[num] && |
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192 svars[2][i] != combo_FillValues[num]) { |
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193 tvar[i] = (double)svars[0][i] |
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194 + (double)svars[1][i] |
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195 + (double)svars[2][i]; |
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196 } |
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197 } |
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198 free_svars(nsvars, svars); |
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199 break; |
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200 case 2: /* ALL_SKY_ALBEDO */ |
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201 nsvars = 2; |
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202 alloc_svars(nsvars, d1, d2, &svars); |
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203 /* read timeslices */ |
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204 read_timeslice(ncid, d1, d2, tslice, "FSR", svars[0]); |
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205 read_timeslice(ncid, d1, d2, tslice, "FSDS", svars[1]); |
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206 /* compute new variable */ |
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207 for (i = 0; i < (d1 * d2); i++) { |
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208 if (svars[0][i] != combo_FillValues[num] && |
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209 svars[1][i] != combo_FillValues[num] && |
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210 (svars[1][i] > 1.e-35 || svars[1][i] < -1.e-35)) { |
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211 tvar[i] = (double)svars[0][i] |
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212 / (double)svars[1][i]; |
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213 } |
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214 } |
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215 free_svars(nsvars, svars); |
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216 break; |
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217 case 3: /* BLACK_SKY_ALBEDO */ |
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218 nsvars = 4; |
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219 alloc_svars(nsvars, d1, d2, &svars); |
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220 /* read timeslices */ |
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221 read_timeslice(ncid, d1, d2, tslice, "FSRNDLN", svars[0]); |
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222 read_timeslice(ncid, d1, d2, tslice, "FSRVDLN", svars[1]); |
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223 read_timeslice(ncid, d1, d2, tslice, "FSDSNDLN", svars[2]); |
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224 read_timeslice(ncid, d1, d2, tslice, "FSDSVDLN", svars[3]); |
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225 /* compute new variable */ |
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226 for (i = 0; i < (d1 * d2); i++) { |
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227 if (svars[0][i] != combo_FillValues[num] && |
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228 svars[1][i] != combo_FillValues[num] && |
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229 svars[2][i] != combo_FillValues[num] && |
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230 svars[3][i] != combo_FillValues[num]) { |
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231 denom = (double)svars[2][i] + (double)svars[3][i]; |
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232 if (denom > 1.e-35 || denom < -1.e-35) { |
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233 tvar[i] = ((double)svars[0][i] |
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234 + (double)svars[1][i]) / |
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235 ((double)svars[2][i] |
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236 + (double)svars[3][i]); |
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237 } |
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238 } |
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239 } |
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240 free_svars(nsvars, svars); |
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241 break; |
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242 case 4: /* NETRAD */ |
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243 nsvars = 2; |
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244 alloc_svars(nsvars, d1, d2, &svars); |
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245 /* read timeslices */ |
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246 read_timeslice(ncid, d1, d2, tslice, "FSA", svars[0]); |
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247 read_timeslice(ncid, d1, d2, tslice, "FIRA", svars[1]); |
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248 /* compute new variable */ |
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249 for (i = 0; i < (d1 * d2); i++) { |
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250 if (svars[0][i] != combo_FillValues[num] && |
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251 svars[1][i] != combo_FillValues[num]) { |
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252 tvar[i] = (double)svars[0][i] |
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253 - (double)svars[1][i]; |
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254 } |
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255 } |
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256 free_svars(nsvars, svars); |
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257 break; |
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258 default: |
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259 fprintf(stderr, "Unknown combination variable %d!\n", num); |
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260 exit(3); |
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261 } |
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262 |
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263 return; |
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264 } |
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265 |
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266 void write_timeslice(int ncid, int varid, size_t d1, size_t d2, |
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267 size_t tslice, float *var) |
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268 { |
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269 size_t start[NC_MAX_VAR_DIMS], count[NC_MAX_VAR_DIMS]; |
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270 |
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271 start[0] = tslice; |
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272 count[0] = 1; |
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273 start[1] = 0; |
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274 count[1] = d1; |
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275 start[2] = 0; |
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276 count[2] = d2; |
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277 |
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278 wrap_nc(nc_put_vara_float(ncid, varid, start, count, var)); |
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279 |
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280 return; |
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281 } |
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282 |
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283 void usage(char *program) |
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284 { |
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285 fprintf(stderr, "Usage: %s hist_file1.nc [ hist_file2.nc ... ]\n", |
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286 program); |
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287 fprintf(stderr, "Requires at least one history output file name\n"); |
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288 exit(5); |
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289 } |
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290 |
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291 int main(int argc, char **argv) |
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292 { |
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293 char **ifnames; |
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294 int i, j, k, nifnames; |
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295 int ncid, ngdims, nvars, ngatts, unlimdimid, varid, ndims, natts, |
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296 dimids[NC_MAX_VAR_DIMS], new_ndims, new_dimids[NC_MAX_VAR_DIMS], |
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297 new_varid, lat_dimid, lon_dimid; |
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298 nc_type xtype, atype; |
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299 char name[NC_MAX_NAME+1], new_name[NC_MAX_NAME+1], |
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300 att_name[NC_MAX_NAME+1], *longname, *new_longname; |
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301 size_t tlen, ts, alen, nlevels, d1, d2; |
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302 float FillValue; |
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303 char FillFlag; |
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304 float *var; |
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305 double *tvar; |
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306 |
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307 #ifdef DEBUG |
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308 printf("Number of total variables (nmtotal_vars) = %d\n", nmtotal_vars); |
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309 printf("Number of combination variables (nmcombo_vars) = %d\n", nmcombo_vars); |
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310 #endif /* DEBUG */ |
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311 |
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312 /* Require at least one parameter (the file on which to work) */ |
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313 if (argc < 2) |
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314 usage(argv[0]); |
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315 |
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316 /* Put the list of filenames in an array of strings */ |
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317 if (!(ifnames = (char **)malloc((argc - 1) * sizeof(char *)))) { |
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318 perror("ifnames"); |
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319 exit(2); |
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320 } |
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321 nifnames = 0; |
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322 for (i = 1; i < argc; i++) { |
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323 if (!(ifnames[nifnames++] = strdup(argv[i]))) { |
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324 perror("ifnames[nifnames++]"); |
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325 exit(2); |
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326 } |
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327 } |
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328 |
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329 /* |
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330 * March through all input files adding new variables for totals |
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331 * across levels. |
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332 */ |
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333 for (i = 0; i < nifnames; i++) { |
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334 printf("Processing %s\n", ifnames[i]); |
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335 /* Open file */ |
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336 wrap_nc(nc_open(ifnames[i], NC_WRITE, &ncid)); |
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337 /* |
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338 * Inquire about number of dimensions, variables, global |
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339 * attributes and the ID of the unlimited dimension |
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340 */ |
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341 wrap_nc(nc_inq(ncid, &ngdims, &nvars, &ngatts, &unlimdimid)); |
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342 wrap_nc(nc_inq_dim(ncid, unlimdimid, name, &tlen)); |
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343 if (strcmp(name, time_name)) { |
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344 fprintf(stderr, "%s is no the unlimited dimension for file %s!\n", time_name, ifnames[i]); |
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345 exit(4); |
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346 } |
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347 /* Retrieve lat and lon dimension IDs */ |
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348 wrap_nc(nc_inq_dimid(ncid, lat_name, &lat_dimid)); |
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349 wrap_nc(nc_inq_dimid(ncid, lon_name, &lon_dimid)); |
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350 /* Put file into define mode */ |
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351 wrap_nc(nc_redef(ncid)); |
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352 /* |
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353 * Define all of the new variables first to improve |
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354 * performance. This means some calls are made twice. |
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355 */ |
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356 /* First, add the new total variables */ |
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357 for (j = 0; j < nmtotal_vars; j++) { |
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358 /* Figure out source variable information */ |
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359 wrap_nc(nc_inq_varid(ncid, total_vars[j], &varid)); |
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360 wrap_nc(nc_inq_var(ncid, varid, name, &xtype, &ndims, dimids, &natts)); |
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361 /* Make sure it has the correct number of dimensions */ |
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362 if (ndims != 4) { |
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363 fprintf(stderr, "Variable %s has %d dimensions!\n", name, ndims); |
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364 exit(4); |
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365 } |
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366 /* Make sure time is the first dimension */ |
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367 if (dimids[0] != unlimdimid) { |
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368 fprintf(stderr, "First dimension of variable %s is not %s!\n", name, time_name); |
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369 exit(4); |
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370 } |
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371 /* Make sure it is a float type */ |
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372 if (xtype != NC_FLOAT) { |
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373 fprintf(stderr, "Only NC_FLOAT type is supported presently!\n"); |
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374 exit(4); |
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375 } |
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376 /* Set dimensions for new variable */ |
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377 new_ndims = 3; |
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378 new_dimids[0] = unlimdimid; |
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379 new_dimids[1] = dimids[2]; |
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380 new_dimids[2] = dimids[3]; |
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381 /* Define new variable */ |
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382 sprintf(new_name, "%s%s", varname_total_prefix, name); |
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383 printf("\tAdding variable %s\n", new_name); |
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384 wrap_nc(nc_def_var(ncid, new_name, xtype, new_ndims, |
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385 new_dimids, &new_varid)); |
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386 /* Copy attributes from source variable to new one */ |
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387 for (k = 0; k < natts; k++) { |
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388 wrap_nc(nc_inq_attname(ncid, varid, k, att_name)); |
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389 if (!strcmp(att_name, "long_name")) { |
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390 wrap_nc(nc_inq_att(ncid, varid, att_name, &atype, &alen)); |
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391 if (!(longname = (char *)malloc((alen+1)*sizeof(char)))) { |
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392 perror("longname"); |
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393 exit(2); |
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394 } |
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395 wrap_nc(nc_get_att_text(ncid, varid, att_name, longname)); |
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396 longname[alen] = '\0'; |
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397 if (!(new_longname = (char *)malloc((strlen(longname_total_prefix)+alen+1)*sizeof(char)))) { |
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398 perror("new_longname"); |
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399 exit(2); |
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400 } |
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401 sprintf(new_longname, "%s%s", longname_total_prefix, longname); |
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402 wrap_nc(nc_put_att_text(ncid, new_varid, att_name, strlen(new_longname), new_longname)); |
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403 free(new_longname); |
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404 free(longname); |
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405 } |
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406 else |
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407 wrap_nc(nc_copy_att(ncid, varid, att_name, ncid, new_varid)); |
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408 } |
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409 } |
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410 /* Second, add the new total variables */ |
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411 for (j = 0; j < nmcombo_vars; j++) { |
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412 /* Set dimensions for new variable */ |
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413 new_ndims = 3; |
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414 new_dimids[0] = unlimdimid; |
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415 new_dimids[1] = lat_dimid; |
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416 new_dimids[2] = lon_dimid; |
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417 /* Define new variable */ |
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418 printf("\tAdding variable %s\n", combo_vars[j]); |
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419 wrap_nc(nc_def_var(ncid, combo_vars[j], NC_FLOAT, |
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420 new_ndims, new_dimids, &new_varid)); |
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421 /* Add attributes */ |
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422 wrap_nc(nc_put_att_text(ncid, new_varid, long_name_name, |
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423 strlen(combo_long_names[j]), |
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424 combo_long_names[j])); |
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425 wrap_nc(nc_put_att_text(ncid, new_varid, units_name, |
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426 strlen(combo_units[j]), combo_units[j])); |
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427 wrap_nc(nc_put_att_text(ncid, new_varid, |
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428 cell_method_name, strlen(cell_method), |
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429 cell_method)); |
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430 wrap_nc(nc_put_att_float(ncid, new_varid, |
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431 FillValue_name, NC_FLOAT, 1, |
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432 &combo_FillValues[j])); |
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433 wrap_nc(nc_put_att_float(ncid, new_varid, |
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434 missing_value_name, NC_FLOAT, 1, |
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435 &combo_FillValues[j])); |
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436 } |
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437 /* Leave define mode */ |
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438 wrap_nc(nc_enddef(ncid)); |
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439 /* Now actually compute and write out the new total variables */ |
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440 for (j = 0; j < nmtotal_vars; j++) { |
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441 /* Figure out source variable information */ |
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442 wrap_nc(nc_inq_varid(ncid, total_vars[j], &varid)); |
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443 wrap_nc(nc_inq_var(ncid, varid, name, &xtype, &ndims, dimids, &natts)); |
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444 /* Check for _FillValue */ |
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445 FillFlag = 0; |
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446 FillValue = 0.; |
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447 if (nc_inq_att(ncid, varid, FillValue_name, &atype, &alen) == NC_NOERR) { |
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448 if (atype == NC_FLOAT && alen) { |
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449 wrap_nc(nc_get_att_float(ncid, varid, |
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450 FillValue_name, &FillValue)); |
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451 FillFlag = 1; |
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452 } |
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453 } |
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454 /* Set dimensions for new variable */ |
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455 new_ndims = 3; |
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456 new_dimids[0] = unlimdimid; |
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457 new_dimids[1] = dimids[2]; |
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458 new_dimids[2] = dimids[3]; |
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459 |
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460 sprintf(new_name, "%s%s", varname_total_prefix, name); |
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461 printf("\tComputing and writing %s\n", new_name); |
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462 /* Retrieve the new varid again */ |
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463 wrap_nc(nc_inq_varid(ncid, new_name, &new_varid)); |
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464 /* |
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465 * Figure out dimensions and total size |
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466 * for a single time slice |
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467 */ |
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468 wrap_nc(nc_inq_dimlen(ncid, dimids[1], &nlevels)); |
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469 wrap_nc(nc_inq_dimlen(ncid, dimids[2], &d1)); |
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470 wrap_nc(nc_inq_dimlen(ncid, dimids[3], &d2)); |
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471 |
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472 /* |
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473 * Allocate space for reading in time slice and for |
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474 * the sum |
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475 */ |
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476 if (!(var = (float *)malloc((d1*d2) * sizeof(float)))) { |
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477 perror("var"); |
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478 exit(2); |
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479 } |
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480 if (!(tvar = (double *)malloc((d1*d2) * sizeof(double)))) { |
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481 perror("tvar"); |
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482 exit(2); |
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483 } |
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484 |
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485 /* Read timeslices, total, and write out new timeslices */ |
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486 for (ts = 0; ts < tlen; ts++) { |
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487 read_total_timeslice(ncid, varid, |
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488 nlevels, d1, d2, FillFlag, FillValue, |
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489 ts, var, tvar); |
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490 for (k = 0; k < (d1*d2); k++) |
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491 var[k] = (float)tvar[k]; |
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492 write_timeslice(ncid, new_varid, d1, d2, |
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493 ts, var); |
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494 } |
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495 |
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496 free(var); |
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497 free(tvar); |
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498 } |
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499 /* Now actually compute and write out the new combo variables */ |
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500 for (j = 0; j < nmcombo_vars; j++) { |
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501 /* Set dimensions for new variable */ |
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502 new_ndims = 3; |
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503 new_dimids[0] = unlimdimid; |
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504 new_dimids[1] = lat_dimid; |
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505 new_dimids[2] = lon_dimid; |
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506 |
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507 printf("\tComputing and writing %s\n", combo_vars[j]); |
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508 /* Retrieve the new varid again */ |
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509 wrap_nc(nc_inq_varid(ncid, combo_vars[j], &new_varid)); |
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510 /* |
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511 * Figure out dimensions and total size |
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512 * for a single time slice |
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513 */ |
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514 wrap_nc(nc_inq_dimlen(ncid, new_dimids[1], &d1)); |
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515 wrap_nc(nc_inq_dimlen(ncid, new_dimids[2], &d2)); |
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516 |
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517 /* |
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518 * Allocate space for reading in time slice and for |
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519 * the sum |
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520 */ |
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521 if (!(var = (float *)malloc((d1*d2) * sizeof(float)))) { |
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522 perror("var"); |
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523 exit(2); |
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524 } |
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525 if (!(tvar = (double *)malloc((d1*d2) * sizeof(double)))) { |
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526 perror("tvar"); |
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527 exit(2); |
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528 } |
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529 |
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530 /* Read timeslices, compute new variable, and write */ |
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531 for (ts = 0; ts < tlen; ts++) { |
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532 read_compute_timeslice(ncid, d1, d2, ts, |
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533 j, tvar); |
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534 for (k = 0; k < (d1*d2); k++) |
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535 var[k] = (float)tvar[k]; |
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536 write_timeslice(ncid, new_varid, d1, d2, |
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537 ts, var); |
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538 } |
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539 |
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540 free(var); |
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541 free(tvar); |
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542 } |
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543 /* Close file */ |
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544 wrap_nc(nc_close(ncid)); |
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545 } |
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546 |
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547 return 0; |
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548 } |