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Re: POLYFILL erases my tick values - solution? [message #21865 is a reply to message #21862]

Fri, 22 September 2000 00:00

Craig Markwardt
Messages: 1869
Registered: November 1996

Senior Member

Andrew <noymer@my-deja.com> writes:

> Dear c.l.i-p,
>
> I am using POLYFILL to shade various regions of an X-Y plot different
> shades of grey. I use PLOT (with /nodata) to draw the axes, then I
> use PLOTS to draw a bunch of lines, etc. (In this case, I'm making a
> simple diagram, not really plotting data, but the question is pretty
> general.)
>
> I'm making PostScript output so I am limited to solid colors
> as opposed to patterns (is there a good reason for that???), but
> so far that's not my real problem.
>
> The problem is that POLYFILL seems to obliterate everything in
> its path, including axis tick values. For the lines I draw, there is
> an easy solution: I just shade first, then draw. But I am working with
> \DATA coordinates, so I'm quite sure (???) I have to PLOT before I can
> POLYFILL, hence the problem that the tick values are over-shaded.
>
> Even the RSI "Using IDL" manual, 1998 paper version, p. 190,
> shows a (very ugly!) example of shading that erases tick values.
>
> The best solution I have found is to use the AXIS procedure
> after POLYFILL, to re-draw the axis.
>
> IS THIS THE BEST SOLUTION?

Yes, this is what I do.

In the end I decided it's not so bad. :-)

Craig

--
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Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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[Message index]

		Re: POLYFILL erases my tick values - solution? By: R.Bauer on Sun, 24 September 2000 23:23
		Re: POLYFILL erases my tick values - solution? By: davidf on Fri, 22 September 2000 00:00
		Re: POLYFILL erases my tick values - solution? By: Liam E. Gumley on Fri, 22 September 2000 00:00
		Re: POLYFILL erases my tick values - solution? By: Craig Markwardt on Fri, 22 September 2000 00:00
		Re: POLYFILL erases my tick values - solution? By: noymer on Fri, 22 September 2000 00:00

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