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Re: Why the contour does not show? [message #63873 is a reply to message #63872]

Fri, 21 November 2008 11:48

xiao zhang
Messages: 81
Registered: June 2008

Member

On Nov 21, 1:32 pm, David Fanning <n...@dfanning.com> wrote:
> xiao writes:
>> Hi~ guys. I have a problem here. I have a small program doing a
>> contour plot. But is just show me the background, not the data. I
>> guess there is something wrong with the colors. Can anyone help?
>> Thanks
>
>> lat=fltarr(75)
>> lon=fltarr(75)
>
>> latstep=(34.3842-31.6985)/74.0
>> lonstep=(121.5581-118.3524)/74.0
>
>> for i=0,74 do begin
>> lat(i)=-31.6985-i*latstep
>> lon(i)=118.3524+i*lonstep
>> endfor
>
>> print,max(lat),min(lat)
>> print,max(lon),min(lon)
>
>> device,decomposed=0
>> !p.background = 255
>> xs=600
>> ys=600
>> window,xsize=xs,ysize=ys
>
>> contour,inits,color=0,xrange=[min(lon),max(lon)],yrange=[min (lat),max
>> (lat)],xtitle='longtitude',ytitle='latitude',title='Sensible heat
>> flux'
>
> I'm going to guess this is because you are doing this
> in PostScript and you are drawing white on white. There
> are lots of articles to read on my web page about PostScript,
> contour plots, and colors. You are making nearly every mistake. :-)
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.dfanning.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")

........Hmmm......seems it will take a lot of time for me to
correct.... :)

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[Message index]

		Re: Why the contour does not show? By: xiao zhang on Fri, 21 November 2008 12:19
		Re: Why the contour does not show? By: David Fanning on Fri, 21 November 2008 12:02
		Re: Why the contour does not show? By: xiao zhang on Fri, 21 November 2008 11:48
		Re: Why the contour does not show? By: David Fanning on Fri, 21 November 2008 11:32
		Re: Why the contour does not show? By: David Fanning on Fri, 21 November 2008 12:31

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