Re: overlay (fwd)

> Hi Mary,
> My data have coordinate array, but they are in different units. After
> making them in same unit,
> overlay works.
> Thanks you very much for your help!
> Mingxuan

Glad to hear it works. I'm CC-ing ncl-talk.

Cheers,

--Mary

On Dec 4, 2007, at 3:49 PM, Mary Haley wrote:

> Hi Mingxuan,
>
> In order to use the "overlay" function to overlay one set of contours
> on another, they must both have coordinate arrays that put the data
> over roughly the same area.
>
> I can't tell from your script if your data has coordinate
> arrays, but you can get some of this information by typing:
>
> printVarSummary(ww26)
> printVarSummary(uu26)
>
> If you are not sure how to tell if your coordinate arrays are correct,
> send me an email.
>
> --Mary
>
> On Tue, 4 Dec 2007, MingXuan Chen wrote:
>
>> Hello,
>> I want to place vertical velocity contour over zonal wind contour.
>> According to http://www.ncl.ucar.edu/Applications/conOncon.shtml,
>> I used overlay procedure overlay(plota,plotb), it doesn't work. I don't
>> know what is wrong.
>>
>> Thank you very much for your help.
>>
>> Mingxuan
>>
>> Please see my code. NCL is versio 4.3.1.
>> --------------------------
>> 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
>> ........
>> wks2 = gsn_open_wks("ps","Fig2t")
>> res2 = True
>> res2_at_cnFillOn = False
>> res2_at_cnLevelSelectionMode = "ManualLevels" ; set manual contour levels
>> res2_at_cnLinesOn = True
>> res2_at_cnMinLevelValF = -5.5
>> res2_at_cnMaxLevelValF = 5.5
>> res2_at_cnLevelSpacingF = 1.0
>> res2_at_cnMonoLineColor = True
>> res2_at_cnLineColor="Black"
>> res2_at_tiMainString ="t=26 min."
>> res2_at_tiXAxisString = "X (km)"
>> res2_at_tiYAxisString = "Height (km)"
>> res2_at_gsnDraw = False ; do not draw picture
>> res2_at_gsnFrame = False ; do not advance frame
>> res2_at_gsnContourZeroLineThicknessF = 0
>> res2_at_gsnContourNegLineDashPattern = 1
>>
>> wres= True
>> wres_at_gsnDraw = False ; do not draw picture
>> wres_at_gsnFrame = False ; do not advance frame
>> wres_at_cnInfoLabelOn = False ;turn off cn info label
>> wres_at_cnFillOn = False
>> wres_at_cnLinesOn = True
>> wres_at_cnLevelSelectionMode = "ExplicitLevels"
>> wres_at_cnLevels =(/-0.5,0,0.5/)
>> wres_at_gsnContourNegLineDashPattern = 1
>> wres_at_gsnRightString = overlay(plota,plotb) "
>> wres_at_gsnLeftString = " "
>> wres_at_tiXAxisString = " "
>> wres_at_cnMonoLineColor = True
>> wres_at_cnLineColor="red"
>> plotb =gsn_csm_contour(wks2,ww26,wres)
>> plota = gsn_csm_contour(wks2,uu26,res2) ; contour the variable
>

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Received on Tue Dec 04 2007 - 16:29:55 MST