| Re: Histogram with logarithmic filling [message #48843] |
Wed, 31 May 2006 10:15 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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David Fanning writes:
> I've only investigated
> the case where YLOG=1, but you have to change a number of
> yfill values to 1 (instead of 0)
Now that I look closely at my code, I did change this line:
Yfill = [0, Yfill, 0]
To this line:
Yfill = [1, Yfill, 1]
But there were 3 or 4 other places where I have to find "[0,yhist,0]"
and change it to "[1,yhist,1]".
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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| Re: Histogram with logarithmic filling [message #48844 is a reply to message #48843] |
Wed, 31 May 2006 10:11  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Jo Klein writes:
> Hm why not? Have you tried setting the /ylog keyword to plothist? What
> happens then?
Well, it is a *little* more complicated than that because
the author of PLOTHIST never anticipated someone might actually
set the PLOT YLOG or XLOG keywords. I've only investigated
the case where YLOG=1, but you have to change a number of
yfill values to 1 (instead of 0), and you have to remember
that !Y.CRANGE contains the exponents of the range values,
not the values themselves when you are in a LOG plot. So you
need something like this:
Yfill = Yfill > 10^(!Y.CRANGE[0]) < 10^(!Y.CRANGE[1])
In place of this:
Yfill = Yfill > !Y.CRANGE[0] < !Y.CRANGE[1]
But about 10 minutes work should set you right for log plots. :-)
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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| Re: Histogram with logarithmic filling [message #48845 is a reply to message #48844] |
Wed, 31 May 2006 09:36 |
Jo Klein
Messages: 54
Registered: January 2006
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Member |
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Hm why not? Have you tried setting the /ylog keyword to plothist? What
happens then?
Jo
Boto wrote:
> Hi~
>
> It is easy to fill histogram in linear plot, but I can't do that on
> logarithmic plot.
> How can I do this?
> I know plothist.pro of astron package. However it is not possible to do
> that in log scale.
>
> Help me please~~
>
> Good Day~
>
> Boto
>
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