Mark Bakker wrote: > Viraj and Jeff - > > Maybe one extension of Jeff's answer. > The process works as long as x, y, and z are 2D arrays of the same > size and shape. > Hence, x and y don't have to form a rectangular grid. > I have used this feature regularly for conformal mapping. > And it makes a lot of sense. > The contour routine simply looks for intersections between x and y values. > Then when it plots it uses the x and y values in the arrays. > So when those are not a rectangular grid, it doesn't care. > It's a cool feature. > I can give an example if you want, > > Mark > > > > Viraj Vajratkar wrote: > > hey guys... i got it... u can use contour(x,y,z)... as in > > x=load('urfile1.dat'), y=load('urfile2.dat), z=load('urfile3.dat > > ').... and then type out the above.... for details about the > > parameters x,y,z see... . > > http://www.scilab.org/product/man-eng/graphics/contour.htm .... so > > matplotlib CAN plot a contour from discrete points!!!.... ive > tried it > > and it works... > Viraj: That only works because x and y describe a rectangular > grid. If > x and y described irregularly spaced points, you would need to > grid the > data first using one of the methods described on that Cookbook page. > > -Jeff > > Mark: That is cool - didn't know it could do that. So I guess the proper answer is contour requires x and y to describe a *regular*, but not recessarily rectilinear, grid. I should have known, since there is an example in basemap (ccsm_popgrid.py) that illustrates this.
-Jeff -- Jeffrey S. Whitaker Phone : (303)497-6313 NOAA/OAR/CDC R/PSD1 FAX : (303)497-6449 325 Broadway Boulder, CO, USA 80305-3328 ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users