[R] Polar coordinates - contour plots

Todor Kondic dolichenus at gmail.com
Wed Dec 10 11:33:42 CET 2008

Thanks Bert for the answer! I'll try to find an appropriate package.
In the end, i have "fiddling".

But, can anyone tell me, were I to create an underlying implementation
of cooridnate transforms, perhaps controlled by user via 'par', would
I need to change the handling of e.g x,y data by every different
high-level plot? Or, are there some general, overridable, methods the
plotting functions call in order to create plotting points from data?



2008/12/10 Bert Gunter <gunter.berton at gene.com>:
> I believe the latter for base R, as the standard contour plotting depends on
> internal (fortran, I think) code that works only for rectangular
> coordinates.Should be only a few lines of fiddling though (exercise left to
> reader).
> Try
> RSiteSearch("polar coordinates", restr="func")
> to see what might be available in packages if fiddling doesn't suit.
> -- Bert Gunter
> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On
> Behalf Of Todor Kondic
> Sent: Tuesday, December 09, 2008 3:19 PM
> To: r-help at r-project.org
> Subject: [R] Polar coordinates - contour plots
> Hello,
> I have data for contour plot which is given in polar coordinates. Is
> there a straightforward way to plot in polar coordinates in R, or do i
> need to fiddle with transformations and then to sort the x and y
> vectors to be in ascending order as required by contour function and
> relatives?
> Cheers,
> Todor
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