Re: [Matplotlib-users] matplot3d: add_collection3d: Turn off baseline?

[Stephen G. <Ste...@an...>]

Setting the y-values of the start and end points to zero, (x[0],0.0) and
(x[-1],0.0), forces the return baseline path to be "well defined" at y=0,
allowing it to be overlain with a second line of a neutral colour.

However, this baseline also wipes a through adjacent slice data.


= FAIL.


Steve.


On 21/11/12 08:38, Stephen Gibson wrote:
> Unfortunately, as you state, "edgecolors='none'"  also wipes the
> (x,y) data line.
>
> I tried adding an additional "erase" zero line, with "edgecolors='none'"
> for each slice, but it seems the return path extends from
> (x[0],y[0])  to (x[-1],y[-1]) via some intermediate point.
>
> An additional blank (x[0], 0.0) to (x[-1], 0.0) does not overlap the 
> baseline.
>
> If I can determine the baseline path (coordinates) this procedure
> may work.
>
> Thanks, for your input.
>
> Steve.
>
> On 21/11/12 04:04, Benjamin Root wrote:
>>
>>
>> On Tue, Nov 20, 2012 at 12:55 AM, Stephen Gibson 
>> <Ste...@an... <mailto:Ste...@an...>> wrote:
>>
>>     I want to plot a series of (x,y) datasets similar to the
>>     polygon plot tutorial example (add_collection3d),
>>     but with a transparent facecolor and no baseline.
>>
>>
>>     Setting alpha=0.0 in the tutorial example (below)
>>     achieves the transparency, but the baseline remains.
>>
>>     Is there a way to remove the baseline?
>>
>>     Tks,
>>
>>     Steve.
>>
>>
>>     from mpl_toolkits.mplot3d import Axes3D
>>     from matplotlib.collections import PolyCollection
>>     from matplotlib.colors import colorConverter
>>     import matplotlib.pyplot as plt
>>     import numpy as np
>>     [cc('w',1.0),cc('w',1.0)
>>     fig = plt.figure()
>>     ax = fig.gca(projection='3d')
>>
>>     cc = lambda arg: colorConverter.to_rgba(arg, alpha=0.0)
>>
>>     xs = np.arange(0, 10, 0.4)
>>     verts = []
>>     zs = [0.0, 1.0, 2.0, 3.0]
>>     for z in zs:
>>          ys = np.random.rand(len(xs))
>>          ys[0], ys[-1] = 0, 0
>>          verts.append(list(zip(xs, ys)))
>>
>>     poly = PolyCollection(verts, facecolors = [cc('r'), cc('g'), cc('b'),
>>                                                 cc('y')])
>>     #poly.set_alpha(0.7)
>>     ax.add_collection3d(poly, zs=zs, zdir='y')
>>
>>     ax.set_xlabel('X')
>>     ax.set_xlim3d(0, 10)
>>     ax.set_ylabel('Y')
>>     ax.set_ylim3d(-1, 4)
>>     ax.set_zlabel('Z')
>>     ax.set_zlim3d(0, 1)
>>
>>
>> You should be able to set "edgecolors='none'" or as the same color as 
>> the facecolors in the constructor for PolyCollection to make it 
>> disappear.  Unfortunately, that would apply to the entire polygon, 
>> and not just the part at the base.
>>
>> Ben Root
>>
>
>
>
> ------------------------------------------------------------------------------
> Monitor your physical, virtual and cloud infrastructure from a single
> web console. Get in-depth insight into apps, servers, databases, vmware,
> SAP, cloud infrastructure, etc. Download 30-day Free Trial.
> Pricing starts from $795 for 25 servers or applications!
> http://p.sf.net/sfu/zoho_dev2dev_nov
>
>
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users