n.l.o wrote: > Im a bit confused of how I should use the "quiver" plotting function. > > My data is 2D, a 512x512 data array, where every entry is an angle > (polarimetry). > I also have an array with the degree of polarization which would be nice to > colour-code in to the arrows. > So: > How do I use my angles to control the direction of the arrows, and how do I > get values to control the colour of the arrows? > > Cheers, > Magnus >
Example with ipython -pylab: x = arange(4) y = arange(5) X, Y = meshgrid(x, y) u = ones_like(X) v = zeros_like(X) c = arange(u.size) # values mapped to colors angles = (X * 20 + Y * 20).ravel() quiver(X, Y, u, v, c, angles=angles) axis([-1, 4, -1, 5]) The .ravel() of the angles is to get around a bug that I fixed a few minutes ago in svn. Eric ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
