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Re: Problem: Filled contour Plots [message #16616 is a reply to message #16535]

Thu, 05 August 1999 00:00

amit99
Messages: 6
Registered: July 1999

Junior Member

> Caution
> Do not draw filled contours over the poles on Cylindrical map
> projections. In this case, the polar points map to lines on the map,
and
> the interpolation becomes ambiguous, causing errors in filling. One
> possible work-around is to limit the latitudes to the range of -89.9
> degrees to + 89.9 degrees, avoiding the poles.
>
> R.Bauer
>
>
Thanks, that solved part of the problem, except it was with my
longitude values. It helped to limit them to (-180,+180), I had values
like 180.01 causing problems.

But, I still cannot get the result I want. I am making one contour, at
the value `0'. I want to fill/shade only one level, of two (I want to
shade all values below zero), but every permuation of c_colors always
shades the values above zero.

my command line looks like:

contour....,level=[0],/fill,c_colors[xxx]

where for [xxx] I tried [0,190], [190,0], [190], all giving the same
(undesired) result.

Any help appreciated.

Amit amit@physics.utoronto.ca

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[Message index]

		Problem: Filled contour Plots By: amit99 on Wed, 04 August 1999 00:00
		Re: Problem: Filled contour Plots By: davidf on Tue, 03 August 1999 00:00
		Re: Problem: Filled contour Plots By: amit99 on Thu, 05 August 1999 00:00
		Re: Problem: Filled contour Plots By: davidf on Thu, 05 August 1999 00:00
		Re: Problem: Filled contour Plots By: amit99 on Thu, 05 August 1999 00:00

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