forrest@0: ; ***********************************************
forrest@0: ; xy_4.ncl
forrest@0: ; ***********************************************
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: begin
forrest@0: ;************************************************
forrest@0: ; read in data
forrest@0: ;************************************************
forrest@0: ;f     = addfile ("data.81.nc","r")
forrest@0:  f     = addfile ("data.933.nc","r")
forrest@0:  x     = f->SITE_ID                               ; get t data
forrest@0: ;y     = f->PREC_ANN                              ; get t data
forrest@0:  y     = f->TNPP_C                                ; get t data
forrest@0:  
forrest@0:  x@long_name = "SITE_ID"
forrest@0: ;y@long_name = "PREC_ANN"
forrest@0:  y@long_name = "TNPP_C"
forrest@0:  
forrest@0: ;************************************************
forrest@0: ; plotting parameters
forrest@0: ;************************************************
forrest@0:  wks   = gsn_open_wks ("png","xy")                 ; open workstation
forrest@0: 
forrest@0:  res                   = True                     ; plot mods desired
forrest@0: ;res@tiMainString      = "Observed 81 sites"            ; add title
forrest@0:  res@tiMainString      = "Observed 933 sites"           ; add title
forrest@0:  res@xyMarkLineModes   = "Markers"                ; choose which have markers
forrest@0:  res@xyMarkers         =  16                      ; choose type of marker  
forrest@0:  res@xyMarkerColor     = "red"                    ; Marker color
forrest@0:  res@xyMarkerSizeF     = 0.01                     ; Marker size (default 0.01)
forrest@0: 
forrest@0:  res@tmLabelAutoStride = True                     ; nice tick mark labels
forrest@0: 
forrest@0: ;plot  = gsn_csm_xy (wks,t&nvalues,t(:),res) ; create plot
forrest@0:  plot  = gsn_csm_xy (wks,x,y,res) ; create plot
forrest@0: 
forrest@0: ;************************************************
forrest@0: ; now create our own markers using NhlNewMarker 
forrest@0: ; available since ncl version 4.2.0.a030
forrest@0: ;************************************************
forrest@0: ; this example will create filled squares. You will have to play with
forrest@0: ; the numbers a but to get the size and shape you desire. On the
forrest@0: ; documentation page for NhlNewMarker, there is a table of values for
forrest@0: ; the current marker set, to give you an idea of where to start.
forrest@0: 
forrest@0: ; res@xyMarkerColor = "blue"
forrest@0: ; res@tiMainString  = "Make your own marker"
forrest@0: ; res@xyMarkers     = NhlNewMarker(wks, "^", 19, 0.0, 0.0, 1.3125, 1.5, 0.0)
forrest@0: ; plot              = gsn_csm_xy (wks,x,y,res) 
forrest@0: 
forrest@0: end