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Re: Moving Axes [message #58506 is a reply to message #3730]

Wed, 30 January 2008 07:10

Allan Whiteford
Messages: 117
Registered: June 2006

Senior Member

chloesharrocks@gmail.com wrote:
> Dear all
>
> I'm plotting data which has both +ve and -ve x and y values and
> possesses a linear relationship which crosses the xaxis at a value
>
>> 0. At the moment my x-axis is 'sitting' at y= -5, which makes it
>
> very hard to notice that the xintercept is positive when just looking
> at the graph (I do have an xyout output telling me the xintercept
> value, but it would be nice if just a quick glance at the graph made
> this obvious). Is there any way for me to move the x-axis up so it
> sits on y=0 (and similarly moving the y-axis so its at x=0) but so
> that my negative value data is still plotted? I presume there must be
> an easy way to do this in IDL - at the moment I'm just overplotting
> lines corresponding to y=0 and x=0 just so I can clearly see the
> xintercept's positive.
>
> Thanks
> Chloï¿½
>
> PS. I'm a complete IDL novice, so the simpler the better please!

Chloï¿½,

Look at the AXIS procedure.

E.g.:

IDL> plot,findgen(11)-5,findgen(11)-5,xstyle=4,ystyle=4
IDL> axis,0,0
IDL> axis,0,0,/yax

Thanks,

Allan

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[Message index]

		moving axes around in 3D plots By: vek on Tue, 28 February 1995 12:07
		Re: Moving Axes By: Brian Larsen on Wed, 30 January 2008 07:13
		Re: Moving Axes By: Allan Whiteford on Wed, 30 January 2008 07:10

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