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Re: xrange woes [message #54987 is a reply to message #54911]

Thu, 19 July 2007 13:26

Josh
Messages: 21
Registered: June 2007

Junior Member

On Jul 18, 10:17 pm, Craig Markwardt
<craigm...@REMOVEcow.physics.wisc.edu> wrote:
> Josh <joshuamonta...@gmail.com> writes:
>> this is a new one for me...
>> i'm plotting data points (~50) that are spread over a small x range
>> (relative to the values). these data points lie at values around
>> 2,000,000, but are spread over a range of about 0.01. I can use
>> xrange=[x1,x2] up until the difference between x2 and x1 is about
>> 0.25. If I try to make the range smaller, it is just ignored (and
>> left at ~0.25) until the range decreases to 0.1 at which point the
>> plotted x range jumps to ~30! The xstyle keyword follows the same
>> pattern (works until the range is ~0.25, then is ignored).
>
>> Has anyone else ever had this happen? Is there some limitation on how
>> small xrange can be given the actual xvalues? btw, these data points
>> have legitimate values to the standard double precision accuracy.
>
> I always understood the IDL direct-graphics system to be limited to
> single precision, even if your data is double precision.
> Try subtracting the mean value and see if it works.
>
> Craig

Thanks Craig, I was able to use both xrange and xstyle by subtracting
most of the value from all of the points.

-Josh

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[Message index]

		Re: xrange woes By: Craig Markwardt on Wed, 18 July 2007 21:17
		Re: xrange woes By: David Fanning on Wed, 18 July 2007 11:02
		Re: xrange woes By: Josh on Thu, 19 July 2007 13:26

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