From: Alan W. Irwin <irwin@be...>  20080314 19:05:00

On 20080314 11:01+0100 Paul Wellner Bou wrote: >> I think yes. Once you get plgriddata and plshades working for polar >> coordinates it should be a simple matter to use plbox to make a rectangular >> box around the circular area created by plshades. You can arrange the plbox >> call so the tick marks on the box are for rectangular coordinates >> corresponding to the polar coordinates used for plshades. > > Puh... I don't understand this at this moment. I'll have to dive into > it. Converting it to polar coordinates, ok. This should be no problem. > Then I would get (I hope so...) a regular grid in polar coordinates. But > if I convert it back it may not be regular, in xy, right? By all means, plot the plshades result in a circular area. Set up plbox to make a square object that fits around that circular area. All my remark meant is you will have to make the x and y tick marks of the box correspond to r cos theta, r sin theta where r and theta are the polar coordinates. Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equationofstate implementation for stellar interiors (freeeos.sf.net); PLplot scientific plotting software package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linuxpowered Science __________________________ 