| Re: Why the contour does not show? [message #63964 is a reply to message #63877] |
Fri, 21 November 2008 14:16   |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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xiao writes:
> haha. That is fine, David, But another problem arouse, When I plot
> like this:
>
>
> map_set,limit=[-34.3842,min(lon),-31.6985,max(lon)], /noborder,color=0
> map_grid, color=0,/label
> map_continents,/countries, /coasts, color=0
> contour,inits,color=0,xtitle='longtitude',ytitle='latitude', title='Sensible
> heat flux', /device, /CELL_FILL, /Overplot
>
>
> It showed the map, but also, it gave me an error:
>
> Program caused arithmetic error: Floating underflow
>
> Is it because my data is larger than the map or something?
Oh, underflows can come from a lot of things. The chances
are, however, that it is not something to worry over
excessively:
http://www.dfanning.com/math_tips/underflow.html
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.")
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