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Re: polar surface plots [message #5893 is a reply to message #5804]

Mon, 26 February 1996 00:00

Mike Mayer
Messages: 2
Registered: February 1996

Junior Member

Sean Oughton wrote:
>
> For 1-d data you can do a
> plot, /polar, r, theta
>
> Is there a similar trick for
> surface, /polar, f(i,j), r, theta
> ?
>
> Checked the help, but can't see anything.
>
> If not, has anyone got a .pro available which will do the necessary
> interpolation onto a Cartesian grid?
>

Sean,

Not sure if you are using IDL or PV-WAVE. If PV-WAVE, check
out the routines CONV_TO_RECT and CONV_FROM_RECT. They allow
you to convert back and forth between cartesian, spherical,
polar, and cylindrical coordinates. For doing spherical surfaces,
you could convert to cartesian and do a regular surface plot, similar
to your example above (except that the lines will still be drawn
rectilinearly insted of radially/concentrically).

Some of WAVE's advanced rendering techniques let you render
a spherical surface, from spherical data. Check out POLY_SPHERE
GRID_SPHERE, POLYSHADE, SPHERE, and RENDER. There are several
useful related routines, but these should get you started.

I hope this helps.

Mike

--
^v^v^v^v^v^v PV-WAVE: Where it's @! http://www.vni.com ^v^v^v^v^v^v^v^
Michael Mayer, Senior Technical Support Engineer Amateur Radio KB8RJO
Visual Numerics, Inc. 32915 Aurora Rd. Suite 160, Solon OH 44139 USA
Email: mayer@boulder.vni.com Human: 216-248-4900 Fax: 216-248-2733
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[Message index]

		polar surface plots By: sean on Fri, 23 February 1996 00:00
		Re: polar surface plots By: Sergei Senin on Tue, 27 February 1996 00:00
		Re: polar surface plots By: Mike Mayer on Mon, 26 February 1996 00:00
		Re: polar surface plots By: Mike Mayer on Mon, 26 February 1996 00:00

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