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Re: Theie is a small problem about HISTOPLOT in Coyote's libraries [message #68273]

Fri, 16 October 2009 10:20

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

duxiyu@gmail.com writes:

> On IDL 7.1.1 under Windows, there seems to be a small problem about
> the procedure HISTOPLOT.
>
> For example,
> Histoplot, Dist(256), xrange=[0, 187]
> Histoplot, Dist(256), xrange=[0, 188]
>
> The figures are both wrong and very different.
> I don't know why these errors happen.

Well, I have to admit, I am pretty much at a complete
loss as to why this happens. I use the Plot command
to set up a plot coordinate system. I use the same
range variables for the Plot command in both the
correct and incorrect case. But if the XRANGE keyword
is set on that plot command (via keyword inheritance,
in this case), the the !Y.S system variable (which
provides Y scaling) is completely screwed up. Why
setting the XRANGE keyword would affect the Y axis like
this is a complete mystery to me.

Perhaps we have discovered a deep bug in the IDL
code!

Cheers,

David

--
David Fanning, Ph.D.
Coyote's Guide to IDL Programming (www.dfanning.com)
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Theie is a small problem about HISTOPLOT in Coyote's libraries By: David Fanning on Fri, 16 October 2009 10:20
		Re: Theie is a small problem about HISTOPLOT in Coyote's libraries By: David Fanning on Fri, 16 October 2009 09:52
		Re: Theie is a small problem about HISTOPLOT in Coyote's libraries By: Jean H. on Fri, 16 October 2009 09:09
		Re: Theie is a small problem about HISTOPLOT in Coyote's libraries By: duxiyu@gmail.com on Fri, 16 October 2009 08:28
		Re: Theie is a small problem about HISTOPLOT in Coyote's libraries By: pgrigis on Fri, 16 October 2009 07:14

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