Hi @vMeijin,

It doesn't seem to say it anywhere, but I think your marker should be in the range [-1, 1] - or at least, looking at your code, centred about 0 in both x and y. The nearest I could find to documentation was here. There is also an example in the gallery http://matplotlib.org/examples/pylab_examples/marker_path.html which makes use of this range (it creates a unit circle).

Does that answer your question?

If so, given what you now know, do you think the documentation could be improved? The documentation for this part of matplotlib can be found https://github.com/matplotlib/matplotlib/blob/master/lib/matplotlib/markers.py#L48 and we would really value any contribution to make it better.

Cheers,

Hello,
I tried it with markers in range [-1, 1]. They are still twice the size of the normal markers. The problem is this line

rescale = max(np.max(np.abs(verts[:,0])), np.max(np.abs(verts[:,1])))

It only considers the absolute max of the x/y (which would be 1 in this case) for rescale. Here is a small example which shows the difference:

from matplotlib import pyplot
import numpy
pyplot.plot([0, 1, 2], [0, 1, 2], marker="s", markersize=20)
pyplot.plot([0, 1, 2 ], [1, 2, 3], marker=numpy.array([[-1, -1], [-1, 1], [1, 1], [1, -1]]), markersize=20)
pyplot.show()

@vMeijin Here's the plot output of your example.

I'm in agreement with @vMeijin here. I think they should be the same size.