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Re: Moving Axes [message #58504 is a reply to message #3730]

Wed, 30 January 2008 07:13

Brian Larsen
Messages: 270
Registered: June 2006

Senior Member

> 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,

This is normal IDL behavior, IDL draws a box around the plot with the
ranges on it so you probably have an xaxis 'sitting' at -5 and another
at +6 (or something).

A more specific example could help us understand more fully but in my
example:
plot, findgen(10)-5
i have a xaxis at y=-6 and y=+4.

I often draw a horizontal line on a plot at y=0 to help guide the eye,
done without thinking using:
http://people.bu.edu/balarsen/IDLdoc/oplot_horiz.html
http://people.bu.edu/balarsen/IDLdoc/oplot_vertical.html

As for making the plot with the x-axis in the middle of the plot at
y=0, I am sure this is possible but I cant recall any easy way. Have
you looked though http://dfanning.com/ ? An amazing number of
questions are answered there,

Cheers,

Brian

------------------------------------------------------------ -------------
Brian Larsen
Boston University
Center for Space Physics

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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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