Right, there is only a subset of marker styles supported in the scatter
function, both 2D and 3D. This is because, behind the scenes, it's drawing
all of the symbols as patches. See
http://matplotlib.sourceforge.net/api/pyplot_api.html#matplotlib.pyplot.scatter
On Fri, Oct 15, 2010 at 10:43 AM, R. Bryn Fenwick <
robert.fenw...@irbbarcelona.org> wrote:
>
> Marker types in 3d plots
>
> Hi,
>
> A few problems with marker types in 3D plots. I can use "o" and "^"
> and "+". However I can not use "." or "," it seems a bit odd to me
> however I get the below error. It should be possible to repeat this
> with the following input
>
> Traceback (most recent call last):
> File "test.py", line 16, in <module>
> ax.scatter(xs, ys, zs, c=c, marker=m)
> File "/Library/Frameworks/Python.framework/Versions/2.6/lib/
> python2.6/site-packages/mpl_toolkits/mplot3d/axes3d.py", line 1019, in
> scatter
> patches = Axes.scatter(self, xs, ys, *args, **kwargs)
> File "/Library/Frameworks/Python.framework/Versions/2.6/lib/
> python2.6/site-packages/matplotlib/axes.py", line 5719, in scatter
> raise ValueError('Unknown marker symbol to scatter')
> ValueError: Unknown marker symbol to scatter
>
> ----
> import numpy as np
> from mpl_toolkits.mplot3d import axes3d
> import matplotlib.pyplot as plt
>
> def randrange(n, vmin, vmax):
> return (vmax-vmin)*np.random.rand(n) + vmin
>
> fig = plt.figure()
> ax = fig.add_subplot(111, projection='3d')
> n = 100
> #for c, m, zl, zh in [('r', '+', -50, -25), ('b', '^', -30, -5)]:
> for c, m, zl, zh in [('r', '+', -50, -25), ('b', '.', -30, -5)]:
> xs = randrange(n, 23, 32)
> ys = randrange(n, 0, 100)
> zs = randrange(n, zl, zh)
> ax.scatter(xs, ys, zs, c=c, marker=m)
>
> ax.set_xlabel('X Label')
> ax.set_ylabel('Y Label')
> ax.set_zlabel('Z Label')
>
> plt.show()
>
>
>
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--
Daniel Hyams
dhy...@gmail.com
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