Ryan May wrote: > Ping. Not sure if you missed it first time around or are just that busy. >
I looked, but decided I needed to look again, and then lost it in the stack. See below. > Ryan > > On Fri, Mar 26, 2010 at 12:13 PM, Ryan May <rma...@gmail.com> wrote: >> Eric, >> >> I just hit a problem with using quiver with Basemap when when >> angles='xy'. Because Basemap's x,y units are in meters, you end up >> with angles that are quantized due to floating point truncation >> (30000. + 0.001*u = 30000.). Changing to angles='uv' fixes the >> problem, but it probably should be automatically scaled, as noted in >> the comments: >> >> elif self.angles == 'xy' or self.scale_units == 'xy': >> # We could refine this by calculating eps based on >> # the magnitude of U, V relative to that of X, Y, >> # to ensure we are always making small shifts in X, Y. >> >> I managed to fix the problem locally by setting: >> >> angles, lengths = self._angles_lengths(U, V, eps=0.0001 * >> self.XY.max()) >> I don't think this will work in all cases. For example, there could be a single arrow at (0,0). Instead of self.XY.max(), how about abs(self.ax.dataLim.width)? Eric >> but I'm not sure if you would want a different fix. If you're happy >> with this fix, I'll go ahead an check in. > > Ryan > ------------------------------------------------------------------------------ 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 _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
