Re: [Matplotlib-users] contour3D custom levels possible?

[Tom A. <ta...@gm...>]

Hello,

I thought that it has to be like Ben wrote:

-    def contour(self, X, Y, Z, levels=10, **kwargs):
+    def contour(self, X, Y, Z, *args, **kwargs):


Your suggestion Eric ( contour(X, Y, Z, [0] ) doesn't work as the levels
are still the same.

Can you translate this thread for a "normal" user? Is this a bug and
will be fixed in a newer version of matplotlib or what do I have to do
to get "less levels"?

Thank you for your help.
Tom



Am 01.08.2010 20:12 schrieb Eric Firing:
> On 08/01/2010 07:35 AM, Benjamin Root wrote:
>> On Sun, Aug 1, 2010 at 9:55 AM, Tom Arens <ta...@gm...
>> <mailto:ta...@gm...>> wrote:
>>
>>     Hello everyone,
>>
>>     does anybody know why the contour3D function has a fixed set of levels?
>>
>>     contour3D(X, Y, Z, levels=10, **kwargs)
>>
>>     I want to plot only one line for one level. With "contourf" it works:
>>
>>
>>
>>     from mpl_toolkits.mplot3d import axes3d
>>     import matplotlib.pyplot as plt
>>
>>     fig = plt.figure()
>>     ax = axes3d.Axes3D(fig)
>>     X, Y, Z = axes3d.get_test_data(0.05)
>>     cset = ax.contourf(X, Y, Z, 0)  # doesn't work with contour
>>     ax.clabel(cset, fontsize=9, inline=1)
>>
>>     plt.show()
>>
>>
>>
>>     Many greetings,
>>     Tom
>>
>>
>> Hmm, interesting.  Looking at the contour3d call signature, it appears
>> that 'levels' was put into the call signature to basically remove that
>> keyword argument from the kwargs that get passed down to the 2-d version
>> of contour.  It is never used in the body of contour3d().
>>
>> I would guess that this is might be a remnant of some original code that
>> actually used the levels parameter.  Simply removing levels=0 from the
>> call signature seems to fix it (and passing [0] to levels as well since
>> it expects a sequence).
>>
>> As a matter of consistency, I think the call signature should be changed
>> to better match the call signature for contourf3d() and for the 2-d
>> version of contour().
> 
> Ben,
> 
> Good idea, go ahead.  The contourf3d docstring can also be modified to 
> match your change to the contour3d docstring.
> 
> I would consider all this as bug-fixing, so it can go in branch and trunk.
> 
> Thanks.
> 
> Eric
> 
>>
>> Ben Root
>>
> 
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