Hi, Maurice and Alan, On Apr 20, 2010, at 0:39 , Maurice LeBrun wrote:
> The general remapping of coordinates is a crucial part of it. I think you are referring to the 0/2pi coordinate "seam" when transforming a rectilinear grid to a polar grid. I think Ed (correct me if I'm wrong, Ed) is referring to a different problem of contouring the phase (i.e. angle or arg) of complex data values regardless of the grid type (i.e. rectilinear or polar). One approach I've taken in the past when visualizing 2d complex data fields (and would like to add to plsurf3d et al) is to make a surface plot with z values based on the amplitudes and color values based on the phase. Using the phase as the hue component of HSL (or HSV) makes for a nice colorization that handles phase wrapping intrinsically since the HSL "color wheel" wraps smoothly itself. Unfortunately, this "trick" doesn't help for contouring data. Dave ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
