I raised this a week or so ago on mpl-users, and after some more digging I thought I'd bring it over to mpl-dev.
With the following snippet, I expect a vertical Line2D from y=(0, 2) and a Collection of squares at y=(4, 5, 6) at the specified time. The actual result is a vertical line and no squares, even though the y axis limits adjust to (0,7) as if something is being plotted with the call to scatter. from pylab import * from datetime import datetime f=figure() ax=f.add_subplot(111) d=datetime(2004,05,26,23,00,00) d=date2num(d) ax.xaxis_date() ln, = ax.plot((d,d,d),range(3)) # vertical line sc = ax.scatter((d,d,d),(4,5,6),marker='s') # no symbols plotted show() However, with ax.xaxis_date() just before show(), I see the Collection. What is the cause of this inconsistency? I was surprised by it, since I naively assumed that once the axis property was set, future additions to the axes would plot with the date axis in mind, as Line2D seems to. I poked around a bit with the _transform, _transforms, and _transOffset properties of the collections, but didn't get anywhere. I'll be using date axes heavily in an interactive MPL project, where it would be nice to set the date axes once and forget about it. I'm willing to work on a fix if the problem is more than a lack understanding on my end. Thanks, Eric ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
