On Tue, Nov 8, 2011 at 8:53 PM, Benjamin Root <ben.r...@ou.edu> wrote:
> On Tuesday, November 8, 2011, Skipper Seabold <jsseab...@gmail.com> wrote:
>> On Tue, Nov 8, 2011 at 6:13 PM, Benjamin Root <ben.r...@ou.edu> wrote:
>>>
>>> On Tue, Nov 8, 2011 at 4:55 PM, Skipper Seabold <jsseab...@gmail.com>
>>> wrote:
>>>>
>>>> Hi,
>>>>
>>>> Two related questions. Consider this plot
>>>>
>>>> -----
>>>>
>>>> import matplotlib.pyplot as plt
>>>> from mpl_toolkits.mplot3d import Axes3D
>>>>
>>>> fig = plt.figure()
>>>> ax = fig.add_subplot(111, projection='3d')
>>>> ax.plot([1,0,0,1],[0,1,0,0],[0,0,1,0])
>>>>
>>>> ax.set_xlim3d(0,1)
>>>> ax.set_ylim3d(0,1)
>>>> #ax.set_ylim3d(1,0)
>>>> ax.set_zlim3d(0,1)
>>>>
>>>> plt.show()
>>>>
>>>> -----
>>>>
>>>> I want to uncomment the line above to reverse the y axis, but as soon
>>>> as I do, the tick labels disappear on the y axis and the z axis tick
>>>> label padding changing. Is there another way to reverse the y axis, or
>>>> should I fix thing after the fact. If so, how can I do this? I don't
>>>> see a zaxis in rcParams.
>>>>
>>>
>>> The first would be a bug (could you please file one?). The second should
>>> probably be a feature request, but I wouldn't expect anything for that
>>> right
>>> away.
>>>
>>
>> 1. https://github.com/matplotlib/matplotlib/issues/570
>
> Thanks.
>
>> 2. Surely there's another workaround in the meantime? I've never
>> worked much with rcParams, going the long way instead, but now that
>> I've discovered it, it's my preferred way of doing things. Anyone have
>> any ideas?
>>
>
> The problem is that mplot3d doesn't query for any params yet. A lot of
> defaults are hard-coded. I would like to start adding defaults, but we will
> need to figure out a consistent naming scheme.
>
File under duh. The answer is just to adjust my plot coordinates
accordingly and fix the label. For example,
import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
alpha = [4,4,2]
nobs = 2000
# draw the r.v.s
p1,p2,p3 = np.random.dirichlet(alpha, size=nobs).T
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
#NOTE: 1 - p2 to reverse the y-axis
ax.scatter(p1, 1-p2, p3, zdir='z',s=2)
# plot the simplex with adjusted y coordinates
ax.plot([1,0,0,1],[1,0,1,1],[0,0,1,0])
ax.set_xlim3d(0,1)
ax.set_ylim3d(0,1)
# reverse the tick labels
ax.set_yticklabels([1.0, .8, .6, .4, .2, 0.0])
ax.set_zlim3d(0,1)
ax.set_title("Dirichlet(4,4,2) on the 2-simplex")
plt.show()
Skipper
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