Dear R-help,

I have a matrix of data values specified in polar coordinates, i.e. (r,theta).

I know that I can transform this image to Cartesian coordinates and then use image to display the results, however, I want to display the image as is, without any coordinate transformations. This would require displaying individual "pieces of pie" colour-coded by their data value.

A comparable plotting routine in Matlab would be pcolor (which doesn't require a regular grid) or the use of polyfill in IDL to fill each polygon.

Does anyone know of a package that could help me out? Any help appreciated.


Regards,
Justin Peter

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Justin Peter
Research Scientist
Earth System Modelling and Radar Applications Group
Centre for Australian Weather and Climate Research (CAWCR),
A partnership between the Australian Bureau of Meteorology and CSIRO

email:   j.peter@bom.gov.au<mailto:j.peter@bom.gov.au>
phone: +61 (0) 3 9669 4838
fax:      +61 (0) 3 9669 4660
mail:  GPO Box 1289K, Melbourne, Victoria 3001, Australia
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