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overlying an image and a contour plot [message #17876]

Fri, 12 November 1999 00:00

tebbens
Messages: 1
Registered: November 1999

Junior Member

We are trying to overlay an image and a contour
plot, but can't get a perfect match in position
and size.

On the contour plot, the x axis is 652 values and
the y axis is 5048 values. We want to fit the
image exactly into the contour plot.

The following commands are used:

position=[.6,.05,r,.95]
tv, image, .6, .05, $
xsize=position(2)-position(0), $
ysize=position(3)-position(1), /normal
xvalue = 652.
yvalue = 5048.

; r should be the length of the x-axis in the
; normal coordinate system (x and y window
; size=1)
r= 10./7.*(.9 * xvalue/yvalue) + .6

contour, xstyle=1, ystyle=1, /iso, $
position=[.6,.05,r,.95], /noerase

The image and contour overlay, but the x-axis of
the image is too long to fit the contour plot.
When the command tvimage is used instead of tv,
the images are the same size, but are offset in
both x and y direction by a few pixels.

We think the problem is with the r value, but
we don't know why the simple commands above
don't work.

Any suggestions to get these to overlay?

Thanks in advance.

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[Message index]

		overlying an image and a contour plot By: tebbens on Fri, 12 November 1999 00:00
		Re: overlying an image and a contour plot By: davidf on Wed, 17 November 1999 00:00
		Re: overlying an image and a contour plot By: Craig Markwardt on Wed, 17 November 1999 00:00
		Re: overlying an image and a contour plot By: Craig Markwardt on Tue, 16 November 1999 00:00
		Re: overlying an image and a contour plot By: davidf on Tue, 16 November 1999 00:00
		Re: overlying an image and a contour plot By: Craig Markwardt on Tue, 16 November 1999 00:00

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