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gridding XYZ to surface: how to blank no data? [message #87563]

Sat, 15 February 2014 07:05

paulartcoelho
Messages: 30
Registered: March 2007

Member

hello there,

i've been using the excellent post by David at https://www.idlcoyote.com/tips/grid_surface.html to show a bunch of XYZ data as contour plots.

there is a detail i didn't manage to solve though. there are combinations of XY in the original table where there are no data (at all, i don't mean Z=0), which is at the end plotted in the contour as if Z=0 (understandably).

but i would like to show these regions in the contour plot as non-existent, to differentiate from "true Z=0" regions.

in other words, in my final contour plot, i'd like to show true Z=0 values as a certain color, the minimum of the color table i adopt, but non-existant XY values as blank white.

any advice?

many thanks,
Paula

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[Message index]

		gridding XYZ to surface: how to blank no data? By: paulartcoelho on Sat, 15 February 2014 07:05
		Re: gridding XYZ to surface: how to blank no data? By: paulartcoelho on Sat, 15 February 2014 07:09
		Re: gridding XYZ to surface: how to blank no data? By: David Fanning on Sat, 15 February 2014 07:52
		Re: gridding XYZ to surface: how to blank no data? By: paulartcoelho on Tue, 18 February 2014 18:52

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