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Re: Postscript settings [message #77273 is a reply to message #77271]

Fri, 19 August 2011 11:43

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Fanning writes:

> IDLgraphics writes:
>
>> I am enhancing a set of postscript plots, replacing the default vector
>> fonts, etc. Some of the features of the plot, such as psym =3, psym
>> =4, and the box around the legend, retain the thin vector font style.
>> I am aware of the symcat and sym packages, but they do not offer
>> thicker 'x' symbols or thicker but not filled diamonds or squares
>
> My version of SymCat certainly allows thicker symbols:
>
> cgplot, cgdemodata(1), PSYM=symcat(4, THICK=3), SYMSIZE=3.0

I have been having a hard time understanding why this
command works to produce thicker symbols:

cgplot, cgdemodata(1), PSYM=symcat(4, THICK=3), SYMSIZE=3.0

But, this command doesn't:

cgplot, cgdemodata(1), PSYM=symcat(4), SYMSIZE=3.0, THICK=3

In theory, they both should work. THICK is being collected
by keyword inheritance and is actually passed to the
SYMCAT function inside of cgPLOT. So, why isn't it working!?

It turns out that the SYMCAT program is called twice in this
command. Once from the command line, and a second time inside
the cgPLOT program. When I examined the symbol just before
the SYMCAT program is called in cgPLOT, the symbol is 8, not
the 4 I was expecting!!

On reflection is working as I expect (I guess!), since
SYMCAT has to return an 8 for a user symbol. I am actually
creating a diamond with USERSYM when the initial SYMCAT
call is made from the command line:

IDL> Print, SymCat(4)
8

This call is made with (essential THICK=1), so no thickness
is used. The second call is acually SYMCAT(8, THICK=3), but
when the symbol is 8, I just return an 8 and don't do anything
else:

IDL> Print, SymCat(8, THICK=3)
8

I can't remember now why I decided to use USERSYM for the
symbols 1,4,5,and 6, but it was probably because I wanted
consistent behavior from *all* the symbols. I wonder if I
should be re-thinking this. :-(

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Postscript settings By: David Fanning on Fri, 19 August 2011 12:27
		Re: Postscript settings By: wlandsman on Fri, 19 August 2011 12:24
		Re: Postscript settings By: Michael Galloy on Fri, 19 August 2011 12:20
		Re: Postscript settings By: wlandsman on Fri, 19 August 2011 11:56
		Re: Postscript settings By: David Fanning on Fri, 19 August 2011 11:55
		Re: Postscript settings By: David Fanning on Fri, 19 August 2011 11:51
		Re: Postscript settings By: David Fanning on Fri, 19 August 2011 11:43
		Re: Postscript settings By: IDLgraphics on Fri, 19 August 2011 11:33
		Re: Postscript settings By: wlandsman on Fri, 19 August 2011 11:27
		Re: Postscript settings By: wlandsman on Fri, 19 August 2011 11:18
		Re: Postscript settings By: David Fanning on Fri, 19 August 2011 11:02

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