Re: polar plots.

[Geraint Paul Bevan]

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Stefan van der Walt wrote:
>  - Function File:  polar (THETA, RHO, FMT)
>      Make a two-dimensional plot given polar the coordinates THETA and
>      RHO.
>
>      The optional third argument specifies the line type.
>
> On Sun, Apr 24, 2005 at 12:37:41AM -0700, Muthiah Annamalai wrote:
>
>>Hello there!
>>Can we do polar plots with Octave/GNU Plot for
>>plotting antenna radiation patterns like that of
>>matlab?
>>Id like to see some concentric circles etc, on it. How
>>do we do that ?
>>


The 'grid' command doesn't adapt to the use of polar co-ordinates.
(Should it? Or would a "polargrid" command be useful?)

You can create a polar grid using:
__gnuplot_set__ grid polar

or gset instead of __gnuplot_set__ if you have an old version of Octave


octave> x = [-pi:pi/20:pi];
octave> y = sin(x);
octave> __gnuplot_set__ grid polar
octave> polar(x,y);



- --
Geraint Bevan
http://homepage.ntlworld.com/geraint.bevan

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