Contour map

Hello,

   I am doing a contour map center at US with surface temperature. The color
scale is set from 212 to 230. How can I change the interval to 218 to 226?

Thanks

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
;************************************************
begin
;************************************************
; read in netCDF file
;************************************************
  a = addfile("jjafields_past.nc","r")
;************************************************
; read in zonal winds
;************************************************
  t = a->t_jja(0,:,:) ; read July zonal winds
;************************************************
; create plot
;************************************************
  wks = gsn_open_wks("ncgm","proj") ; open a ps file
  gsn_define_colormap(wks,"gui_default")

  res = True
  res@mpProjection = "CylindricalEquidistant" ; choose projection
  res@mpGridAndLimbOn = True ; turn on lat/lon lines
  res@mpPerimOn = False ; turn off box around plot
  res@mpGridLatSpacingF = 30. ; spacing for lat lines
  res@mpGridLonSpacingF = 30. ; spacing for lon lines
  res@mpFillOn = False

  res@mpLimitMode = "LatLon"
  res@mpMinLonF = 233.0
  res@mpMaxLonF = 295.0
  res@mpMinLatF = 23.0
  res@mpMaxLatF = 50.0
  res@cnFillOn = True ; color plot desired
  res@cnLineLabelsOn = False ; turn off contour lines
  res@txFontHeightF = 0.015

  res@vpXF = 0.1 ; make plot bigger
  res@vpYF = 0.9
  res@vpWidthF = 0.8
  res@vpHeightF = 0.8

  res@gsnSpreadColors = True ; use full range of color map
  res@gsnSpreadColorStart = 0
  res@gsnSpreadColorEnd = -1

-- 
Cecille M. VIllanueva-Birriel
Graduate Student
Earth & Atmospheric Sciences
Purdue University

_______________________________________________
ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Mon May 31 16:17:44 2010