On 02/15/2011 07:40 AM, Benjamin Root wrote: > I have come across a little inconsistency that was unexpected in the > matplotlib API. The following is perfectly valid: > > import matplotlib.pyplot as plt > plt.plot([], []) > plt.show() > > > However, this is not valid: > > import matplotlib.pyplot as plt > plt.scatter([], []) > plt.show() > > > The immediate issue that comes up in scatter is that it attempts to find > min/max of the input data for the purpose of autoscaling (this can > probably be done better by just using set_xmargin(0.05) and > set_ymargin(0.05)). This can easily be bypassed with an if statement. > However, then we discover that polygon collection do not like having > empty offsets, which leads to a failure in the affine transformation. > > So, the question is, is this a bug or a feature? I personally believe > that empty data is a perfectly valid scenario and given that other > matplotlib functions handle it gracefully, we should make the > collections object more friendly to empty data.
I agree; a call with empty data should simply not plot anything. Eric > > Ben Root > ------------------------------------------------------------------------------ The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
