<div dir="ltr"><div><div>Hello...<br><br></div>Could you please tell me how to control the contour interval for color shading once im using this function <b>gsn_csm_vector_scalar_map</b>.<br></div><br>;===========PLOT=================<br><br> wks = gsn_open_wks("png","overlay")<br><br> res                      = True             ; plot mods desired<br> plot = new(16,graphic)<br><br> res@gsnDraw            = False          ; don't draw<br> res@gsnFrame           = False          ; don't advance frame<br><br>; vector rescoures<br> res@vcRefLengthF            = 0.045<br> res@vcRefMagnitudeF         = 20.0<br> res@vcRefAnnoOrthogonalPosF = -0.12<br> res@vcRefAnnoParallelPosF   = 0.997<br> res@vcRefAnnoFontHeightF    = 0.015<br> res@vcMinDistanceF         = 0.03<br> res@lbLabelBarOn       = False   <br><br> res@mpProjection  = "AzimuthalEquidistant" ; choose map projection<br> res@mpLimitMode   = "LatLon"         ; use lat/lon coordinates to limit area<br> res@mpMinLatF     = 25.<br> res@mpMaxLatF     = 75.<br> res@mpMinLonF     = -80.<br> res@mpMaxLonF     = 20.<br> res@gsnMaximize          = True  <br><br><b> res@gsnScalarContour       = True<br> res@cnFillOn               = True<br> res@cnFillPalette          = "gui_default"    ; set color map<br> res@cnLinesOn              = False            ; turn off contour lines<br></b><br><br><br> do i=0,15<br> plot(i) = gsn_csm_vector_scalar_map(wks,u(i,:,:),v(i,:,:), \<br>                                  p(i,:,:),res)<br> end do<br><br> resP                    = True               ; modify the panel plot<br> resP@gsnMaximize          = True  <br> gsn_panel(wks,plot,(/4,4/),resP)              ; now draw as one plot<br><br><br>end<br><br><br></div>