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setColorContourClear
Sets the color contours between two given levels to transparent.
Prototype
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl" ; These four libraries are automatically load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl" ; loaded from NCL V6.4.0 onward. load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl" ; No need for user to explicitly load. load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/shea_util.ncl" function setColorContourClear ( plot : graphic, clow : numeric, chigh : numeric ) return_val [1] : graphic
Arguments
plotThe plot to be modified.
clowThe low value of the range of contours that the user wishes to set to transparent.
chighThe high value of the range of contours that the user wishes to set to transparent.
Return value
plot will be returned with the given color contours modified.
Description
This function sets contours in the range clow to chigh to clear (transparent).
Examples
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl" load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl" load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl" load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/shea_util.ncl" begin f = addfile ("/cgd/cas/shea/MURPHYS/ATMOS/80.nc", "r") x = f->U(0,17,:,:) ;Grab first timestep, 17th sigma level wks = gsn_open_wks("ps","test") res = True res@gsnDraw = False res@gsnFrame = False plot = gsn_csm_contour_map_ce(wks,x,res) plot = setColorContourClear(plot,-5.,5.) ;set all contours between -5 and 5 m/s to transparent draw(plot) frame(wks) end