This bug or feature? is still in matplotlib 0.99.1.1 (Ubuntu 10.04 LTS)
More precisely scatter using symbols with zero area ('x', '+') will not
pick, regardless of the float value in picker.
Although this DOES work with plot, you can't vary the marker size between
points like you can with scatter.
I have also confirmed this in a version of the example in the docs
http://matplotlib.sourceforge.net/users/event_handling.html#picking-exercise
Which I could upload, but the code below is just fine.
If this is a feature, I suggest it be stated in the documentation.
Kyle Whitmer wrote:
>
> I'm having trouble using picker on a scatter plots with various markers
> (e.g. + and x). It works with the plot command fine. What am I missing?
> Sample code below.
>
> import numpy
> import pylab
>
> def onpick(event):
> print 'Pick:',event.ind
>
> fig = pylab.figure()
> ax = fig.add_subplot(111)
>
> x1,y1 = numpy.random.random((2,100))
> series1=ax.plot(x1,y1,marker='x',color='b',linestyle='',label='plot',picker=5)
> x2,y2 = numpy.random.random((2,100))
> series2=ax.scatter(x2,y2,marker='x',color='g',label='scatter-X',picker=5)
> x3,y3 = numpy.random.random((2,100))
> series3=ax.scatter(x3,y3,marker='o',color='r',label='scatter-O',picker=5)
>
> fig.canvas.mpl_connect('pick_event',onpick)
> pylab.legend()
> pylab.show()
>
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