forrest@0: load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
forrest@0: load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
forrest@0: 
forrest@0: procedure pminmax(data:numeric,name:string)
forrest@0: begin
forrest@0:   print ("min/max " + name + " = " + min(data) + "/" + max(data))
forrest@0:   if(isatt(data,"units")) then
forrest@0:     print (name + " units = " + data@units)
forrest@0:   end if
forrest@0: end
forrest@0: 
forrest@0: ;
forrest@0: ; Main code.
forrest@0: ;
forrest@0: begin
forrest@0:   data_types    = (/ "Obs",        "Model"       /)
forrest@0:   data_names    = (/ "data.81.nc", "i01.03cn_1545-1569_ANN_climo.nc" /)
forrest@0: ; data_names    = (/ "data.81.nc", "i01.04casa_1605-1629_ANN_climo.nc" /)
forrest@0:   filevar_names = (/ (/"PREC_ANN","TNPP_C"/), (/"RAIN","NPP"/) /)
forrest@0:   ndata_types   = dimsizes(data_types)
forrest@0: 
forrest@0:   data_file_obs = addfile(data_names(0),"r")    ; Open obs file
forrest@0:   data_file_mod = addfile(data_names(1),"r")    ; Open model file
forrest@0: 
forrest@0: ;
forrest@0: ; Read four variables from files.
forrest@0: ;
forrest@0:   PREC_ANN = tofloat(data_file_obs->PREC_ANN)
forrest@0:   TNPP_C   = data_file_obs->TNPP_C
forrest@0:   RAIN     = data_file_mod->RAIN
forrest@0:   NPP    = data_file_mod->NPP
forrest@0: ;
forrest@0: ; Units for these four variables are:
forrest@0: ;
forrest@0: ; PREC_ANN : mm/year
forrest@0: ; TNPP_C   : g C/m^2/year
forrest@0: ; RAIN     : mm/s
forrest@0: ; NPP    : g C/m^2/s
forrest@0: ;
forrest@0: ; We want to convert these to "m/year" and "g C/m^2/year".
forrest@0: ;
forrest@0:   nsec_per_year = 60*60*24*365                  ; # seconds per year
forrest@0: 
forrest@0: ; Do the necessary conversions.
forrest@0:   PREC_ANN = PREC_ANN / 1000.
forrest@0:   RAIN     = (RAIN / 1000.) * nsec_per_year
forrest@0:   NPP    = NPP * nsec_per_year
forrest@0: 
forrest@0: ; Redo the units.
forrest@0:   PREC_ANN@units = "m/yr"
forrest@0:   RAIN@units     = "m/yr"
forrest@0:   NPP@units    = "gC/m^2/yr"
forrest@0:   TNPP_C@units   = "gC/m^2/yr"
forrest@0: 
forrest@0:   pminmax(PREC_ANN,"PREC_ANN")
forrest@0:   pminmax(TNPP_C,"TNPP_C")
forrest@0:   pminmax(RAIN,"RAIN")
forrest@0:   pminmax(NPP,"NPP")
forrest@0: 
forrest@0:   RAIN_1D     = ndtooned(RAIN)
forrest@0:   NPP_1D    = ndtooned(NPP)
forrest@0:   PREC_ANN_1D = ndtooned(PREC_ANN)
forrest@0:   TNPP_C_1D   = ndtooned(TNPP_C)
forrest@0: 
forrest@0: ;
forrest@0: ; Calculate some "nice" bins for binning the data in equally spaced
forrest@0: ; ranges.
forrest@0: ;
forrest@0:   nbins       = 15     ; Number of bins to use.
forrest@0: 
forrest@0:   nicevals    = nice_mnmxintvl(min(RAIN_1D),max(RAIN_1D),nbins,True)
forrest@0:   nvals       = floattoint((nicevals(1) - nicevals(0))/nicevals(2) + 1)
forrest@0:   range       = fspan(nicevals(0),nicevals(1),nvals)
forrest@0: ;
forrest@0: ; Use this range information to grab all the values in a
forrest@0: ; particular range, and then take an average.
forrest@0: ;
forrest@0:   nr      = dimsizes(range)
forrest@0:   nx      = nr-1
forrest@0:   xvalues     = new((/2,nx/),typeof(RAIN_1D))
forrest@0:   xvalues(0,:) = range(0:nr-2) + (range(1:)-range(0:nr-2))/2.
forrest@0:   dx           = xvalues(0,1) - xvalues(0,0)       ; range width
forrest@0:   dx4          = dx/4                              ; 1/4 of the range
forrest@0:   xvalues(1,:) = xvalues(0,:) - dx/5.
forrest@0:   yvalues      = new((/2,nx/),typeof(RAIN_1D))
forrest@0:   mn_yvalues   = new((/2,nx/),typeof(RAIN_1D))
forrest@0:   mx_yvalues   = new((/2,nx/),typeof(RAIN_1D))
forrest@0: 
forrest@0:   do nd=0,1
forrest@0: ;
forrest@0: ; See if we are doing model or observational data.
forrest@0: ;
forrest@0:     if(nd.eq.0) then
forrest@0:       data     = PREC_ANN_1D
forrest@0:       npp_data = TNPP_C_1D
forrest@0:     else
forrest@0:       data     = RAIN_1D
forrest@0:       npp_data = NPP_1D
forrest@0:     end if
forrest@0: ;
forrest@0: ; Loop through each range and check for values.
forrest@0: ;
forrest@0:     do i=0,nr-2
forrest@0:       if (i.ne.(nr-2)) then
forrest@0:         print("")
forrest@0:         print("In range ["+range(i)+","+range(i+1)+")")
forrest@0:         idx = ind((range(i).le.data).and.(data.lt.range(i+1)))
forrest@0:       else
forrest@0:         print("")
forrest@0:         print("In range ["+range(i)+",)")
forrest@0:         idx = ind(range(i).le.data)
forrest@0:       end if
forrest@0: ;
forrest@0: ; Calculate average, and get min and max.
forrest@0: ;
forrest@0:       if(.not.any(ismissing(idx))) then
forrest@0:         yvalues(nd,i)    = avg(npp_data(idx))
forrest@0:         mn_yvalues(nd,i) = min(npp_data(idx))
forrest@0:         mx_yvalues(nd,i) = max(npp_data(idx))
forrest@0:         count = dimsizes(idx)
forrest@0:       else
forrest@0:         count            = 0
forrest@0:         yvalues(nd,i)    = yvalues@_FillValue
forrest@0:         mn_yvalues(nd,i) = yvalues@_FillValue
forrest@0:         mx_yvalues(nd,i) = yvalues@_FillValue
forrest@0:       end if
forrest@0: ;
forrest@0: ; Print out information.
forrest@0: ;
forrest@0:       print(data_types(nd) + ": " + count + " points, avg = " + yvalues(nd,i))
forrest@0:       print("Min/Max:  " + mn_yvalues(nd,i) + "/" + mx_yvalues(nd,i))
forrest@0: 
forrest@0: ;
forrest@0: ; Clean up for next time in loop.
forrest@0: ;
forrest@0:       delete(idx)
forrest@0:     end do
forrest@0:     delete(data)
forrest@0:     delete(npp_data)
forrest@0:   end do
forrest@0: 
forrest@0:   xvalues@long_name = "Mean Annual precipitation (m/year)"
forrest@0:   yvalues@long_name = "NPP (g C/m2/year)"                 
forrest@0:  
forrest@0: ;
forrest@0: ; Start the graphics.
forrest@0: ;
forrest@0: ; wks = gsn_open_wks("x11","npp")
forrest@0:   wks = gsn_open_wks("png","npp")
forrest@0: 
forrest@0:   res             = True
forrest@0:   res@tiMainString = "Observed vs i01.03cn"
forrest@0: ; res@tiMainString = "Observed vs i01.04casa"
forrest@0:   res@gsnMaximize = False
forrest@0:   res@gsnDraw     = False
forrest@0:   res@gsnFrame    = False
forrest@0:   res@xyMarkLineMode = "Markers"
forrest@0:   res@xyMarkerSizeF   = 0.014
forrest@0:   res@xyMarker       = 16
forrest@0: ; res@xyMarkerColors = (/"Gray25","Gray50"/)
forrest@0:   res@xyMarkerColors = (/"brown","blue"/)
forrest@0:   res@trYMinF        = min(mn_yvalues) - 10.
forrest@0:   res@trYMaxF        = max(mx_yvalues) + 10.
forrest@0: 
forrest@0:   xy = gsn_csm_xy(wks,xvalues,yvalues,res)
forrest@0: 
forrest@0:   max_bar = new((/2,nx/),graphic)
forrest@0:   min_bar = new((/2,nx/),graphic)
forrest@0:   max_cap = new((/2,nx/),graphic)
forrest@0:   min_cap = new((/2,nx/),graphic)
forrest@0: 
forrest@0:   lnres = True
forrest@0: 
forrest@0:   line_colors = (/"brown","blue"/)
forrest@0:   do nd=0,1
forrest@0:     lnres@gsLineColor = line_colors(nd)
forrest@0:     do i=0,nx-1
forrest@0:      
forrest@0:       if(.not.ismissing(mn_yvalues(nd,i)).and. \
forrest@0:          .not.ismissing(mx_yvalues(nd,i))) then
forrest@0: ;
forrest@0: ; Attach the vertical bar, both above and below the marker.
forrest@0: ;
forrest@0:         x1 = xvalues(nd,i)
forrest@0:         y1 = yvalues(nd,i)
forrest@0:         y2 = mn_yvalues(nd,i)
forrest@0:         min_bar(nd,i) = gsn_add_polyline(wks,xy,(/x1,x1/),(/y1,y2/),lnres)
forrest@0: 
forrest@0:         y2 = mx_yvalues(nd,i)
forrest@0:         max_bar(nd,i) = gsn_add_polyline(wks,xy,(/x1,x1/),(/y1,y2/),lnres)
forrest@0: ;
forrest@0: ; Attach the horizontal cap line, both above and below the marker.
forrest@0: ;
forrest@0:         x1 = xvalues(nd,i) - dx4
forrest@0:         x2 = xvalues(nd,i) + dx4
forrest@0:         y1 = mn_yvalues(nd,i)
forrest@0:         min_cap(nd,i) = gsn_add_polyline(wks,xy,(/x1,x2/),(/y1,y1/),lnres)
forrest@0: 
forrest@0:         y1 = mx_yvalues(nd,i)
forrest@0:         max_cap(nd,i) = gsn_add_polyline(wks,xy,(/x1,x2/),(/y1,y1/),lnres)
forrest@0:       end if
forrest@0:     end do
forrest@0:   end do
forrest@0: 
forrest@0:   draw(xy)
forrest@0:   frame(wks)
forrest@0: 
forrest@0: end
forrest@0: