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Re: Please help with color contour [message #2972 is a reply to message #2907]

Tue, 18 October 1994 12:53

landers
Messages: 45
Registered: May 1993

Member

In article <1994Oct13.015610.24061@galileo.cc.rochester.edu>, zdng@laforge.cc.rochester.edu (Zhong Ding) writes:
[snip]
|>
|> % POLYCONTOUR: Warning: Unclosed contour ignored.
|>
[snip]

As has been mentioned already, you need to pad your data with a 'border' of at
least one cell on each side, to force the contours to close (an open contour
is one that disappears off the edge of the plot, and does not enscribe a
complete closed path). I prefer to pad with 2 cells on each side and do some
interpolation stuff so that the closure of the contours doesn't look so
strange (move the closure away from the real data a bit more).

However, be careful of POLYCONTOUR. I have noticed that it's not too smart at
arranging the contours. If you have a local maxima inside a larger minima,
it'll get lost (blotted out).

If you can, it's better to use something based on TV to make an image of
your data, and then overlay contours on that. Check out IMAGE_CONT.

;Dave

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[Message index]

		Please help with color contour By: zdng on Wed, 12 October 1994 18:56
		Re: Please help with color contour By: landers on Tue, 18 October 1994 12:53
		Re: Please help with color contour By: andy on Thu, 13 October 1994 06:31

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