Re: [Plplot-general] Possible to rotate graphs?

[Alan W. I. <ir...@be...>]

On 2006-12-11 14:58-0700 Orion Poplawski wrote:

> Is it possible to rotate graphs on the page?  The idea would be to have
> two columns of plots and have the plots on the left be rotated some
> angle relative to the plots on the right.
>

Yes.  Use the -ori xxx command-line option to rotate plots by arbitrary
angles.  xxx=1. corresponds to a 90 deg rotation.

Note, there is a long-standing bug in this functionality (see the
"Parallelogram problem for rotation" in the PROBLEMS file) for non-integral
xxx and aspect ratio different from unity.  I suspect that deep inside the
PLplot core there is a confusion between x and y coordinate scales (which
doesn't matter, of course, for unity aspect ratio) when doing a rotation
causing rectangles to be turned into parallelograms, but none of the core
developers have ever been able to figure out the source of the problem, and
xxx = 0, 1, 2, or 3 certainly works correctly.

Alan
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Alan W. Irwin

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the FreeEOS equation-of-state implementation
for stellar interiors (freeeos.sf.net); PLplot scientific plotting software
package (plplot.org); the Yorick front-end to PLplot (yplot.sf.net); the
Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project
(lbproject.sf.net).
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Linux-powered Science
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