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
<stephen.gib...@anu.edu.au <mailto:stephen.gib...@anu.edu.au>> 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
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