| Re: POLYFILL erases my tick values - solution? [message #21852] |
Sun, 24 September 2000 23:23 |
R.Bauer
Messages: 1424
Registered: November 1998
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Senior Member |
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Andrew wrote:
>
> 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?
>
> TIA,
> Andrew
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.
That's true.
But you can use first a routine which will set the data coordinates to
the plot.
This is done with plot and the keyword /nodata.
regards
Reimar Bauer
--
R.Bauer
Institut fuer Stratosphaerische Chemie (ICG-1)
Forschungszentrum Juelich
email: R.Bauer@fz-juelich.de
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| Re: POLYFILL erases my tick values - solution? [message #21864 is a reply to message #21862] |
Fri, 22 September 2000 00:00  |
Liam E. Gumley
Messages: 378
Registered: January 2000
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Senior Member |
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Andrew <noymer@my-deja.com> wrote in message
news:8qgda2$ml8$1@nnrp1.deja.com...
> 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?
Here's another solution:
;- Make sure decomposed color is off, and load grayscale
device, decomposed=0
loadct, 0
;- Set plot position (normal coordinates)
p = [0.1, 0.1, 0.9, 0.9]
;- Fill plot window
polyfill, [p[0], p[2], p[2], p[0], p[0]], [p[1], p[1], p[3], p[3], p[1]], $
/normal, color=(0.5 * !d.table_size)
;- Create plot
plot, indgen(10), /noerase, position=p
Cheers,
Liam.
http://cimss.ssec.wisc.edu/~gumley
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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 |
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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
--
------------------------------------------------------------ --------------
Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
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