Which older revision (or release) worked as you expected? Mike
Tony S Yu wrote: > Hi, > > Awhile back, Jae-Joon helped me transform collection sizes from points > to data values by overriding the `get_transform` method of a > RegularPolyCollection (see example code below). > > When I tried the code today, the collection didn't appear on the plot. > Removing the get_transform method below brings the collection back, > but of course, the sizes are not what I want. > > Some simple testing suggests that changing the transform returned by > `get_transform` changes the offsets of the collection items. In other > words, the transform originally (i.e. in some older revision) modified > only the scale of collection items, but now appears to modify both the > scale and offset. > > Is there a way to modify only the scale of collection items? > > Thanks, > -Tony > > BTW, I'm on svn r7950. > > #----------------- > # The squares will not show up with the code below > # Comment out the get_transform method to see squares > # Change scale_x and scale_y to values close to 1 to see how they > change both scale and offset > > class SquareCollection(collections.RegularPolyCollection): > """Return a collection of squares.""" > > def __init__(self, **kwargs): > super(SquareCollection, self).__init__(4, rotation=np.pi/4., > **kwargs) > > def get_transform(self): > """Return transform scaling circle areas to data space.""" > ax = self.axes > pts2pixels = 72.0 / ax.figure.dpi > scale_x = pts2pixels * ax.bbox.width / ax.viewLim.width > scale_y = pts2pixels * ax.bbox.height / ax.viewLim.height > return transforms.Affine2D().scale(scale_x, scale_y) > > ax = plt.gca() > circle_areas = np.pi * np.ones(4) > xy = [(0, 0), (0, 1), (1, 0), (1, 1)] > squares = SquareCollection(sizes=circle_areas, > offsets=xy, transOffset=ax.transData, > facecolor='black') > ax.add_collection(squares, autolim=True) > plt.axis([-0.5, 1.5, -0.5, 1.5]) > plt.show() > > > > ------------------------------------------------------------------------------ > 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 > -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA ------------------------------------------------------------------------------ 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
