[ncl-talk] Problems in shading areas exceeding 95% confidence level

[Dinuka Silva]

Hello,
I'm having problems in shading areas exceeding 95% confidence level. I want
to plot correlation between precipitation and T2m temperature only for land
area. So I masked T2m temperature for land and plot the correlation map. I
also want to shade the areas exceeding 95% significance level.
I could shade the areas exceeding 95% confidence  level on land but all the
ocean areas are also shaded (missing value area). How can I remove the
shading on ocean. I use ncl version 6.3.0.
My ncl code and plot are as follows.

Thank You.
Dinuka



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/diagnostics_cam.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/shea_util.ncl"
;----------------------------------------------------------------
begin
f    = "mon.precip.nc"
fin1  = addfile(f, "r")
time3 = fin1->time
;---------------------------------------------------------------------
ymd3 = cd_calendar(time3,2)
iTim2 = ind (ymd3.ge.19790101.and.ymd3.lt.20130101)
;--------------------------------------------------------------------
preci = fin1->precip(iTim2,{6:10},{79:82})
printVarSummary(preci)
pano = rmMonAnnCycTLL(preci)
;----------------------------------------------------------------------
p = month_to_season(pano,"JJA")
printVarSummary(p)
index =dim_avg_Wrap (dim_avg_Wrap (p (time|:,lat|:,lon|:)))
;***********************************************************************
          ; T2M over land
;**********************************************************************
ECMWF   = "/home/dinu/ecmwf/monthly/"
files   = systemfunc ("ls "+ECMWF+"t2/t2.mon.*.nc")
fin = addfiles (files, "r")
time = fin[:]->time
;----------------------------------------------------------------
ymd = cd_calendar(time,2)
iTim = ind (ymd.ge.19790101.and.ymd.lt.20130101)
;----------------------------------------------------------------
T2  = fin[:]->t2(iTim,:,:)
T2 = T2-273.15
T2 at units = "C"
;------------------------------------------------------------
f1 = systemfunc("ls /home/dinu/data/landsea.nc")
a = addfile(f1, "r")

;a = addfile("landsea.nc","r")
lsdata = a->LSMASK
lsm = landsea_mask(lsdata,T2&lat,T2&lon)
t2 = mask(T2,lsm.eq.0,False)
copy_VarCoords(T2,t2)
;-------------------------------------------------------------
Temp = month_to_season(t2,"JJA")
;**************************************************************************
          ; Correlation Rainfall and T2M
;**************************************************************************
ccr = escorc(index,Temp(lat|:,lon|:,time|:))
copy_VarCoords(t2(0,:,:),ccr)
printVarSummary(ccr)
;------------------------------------------------------------------------
siglvl = 0.05
Prob = rtest(ccr(lat|:,lon|:),34,0)

Prob!0 = "lat"
Prob!1 = "lon"
Prob&lat = ccr&lat
Prob&lon = ccr&lon
printVarSummary(Prob)
;__________________________________________________________________________
wks =gsn_open_wks("X11","")
gsn_define_colormap(wks,"BlueDarkRed18")

res = True
res at cnLinesOn = False
res at cnFillOn = True ; turn color on
res at gsnSpreadColors = True
res at cnLineLabelsOn  = False
res at tiMainString = " "
res at cnLevelSelectionMode = "ManualLevels"      ; manually set cn levels
res at cnMinLevelValF       = -0.4                 ; min level
res at cnMaxLevelValF       =  0.4                 ; max level
res at cnLevelSpacingF      = 0.1                 ; contour level spacing
;res at cnLabelAutoSrtide = True
res at mpCenterLonF =180
res at gsnDraw = False
res at gsnFrame = False

res1 = True
res1 at gsnAddCyclic = False
res1 at gsnDraw = False
res1 at gsnFrame = False
res1 at cnLevelSelectionMode = "ManualLevels"
res1 at cnMinLevelValF = 0.00
res1 at cnMaxLevelValF = 1.05
res1 at cnLevelSpacingF = 0.05
res1 at cnInfoLabelOn = False
res1 at cnLinesOn = False
res1 at cnLineLabelsOn = False
res1 at cnFillScaleF = 0.6                ; add extra density
;************************************************************************

plot = gsn_csm_contour_map(wks,ccr,res)
plot = gsn_csm_contour_map(wks,ccr,res)

opt = True
opt at gsnShadeFillType = "pattern"       ; pattern fill
opt at gsnShadeLow = 17                   ; use pattern 17
opt at gsnShadeDotSizeF = 0.3


plot1 = gsn_csm_contour(wks,Prob, res1)
plot1 = gsn_contour_shade(plot1,0.05,0.75,opt)

overlay (plot, plot1)
draw(plot)
frame (wks)

end

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