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Good evening,
I am at present migrating an application of mine from py27+pygtk (with mpl)
to py33+pygobject (gtk3)
Unfortunately I am unable to use
from matplotlib.backends.backend_gtk3agg import FigureCanvasGTK3Agg as
FigureCanvasfrom matplotlib.backends.backend_gtk3 import
NavigationToolbar2GTK3 as NavigationToolbar
Which is is on the examples (
http://matplotlib.org/examples/user_interfaces/embedding_in_gtk3_panzoom.html)
but is also the logical translation from what I presently have.
This falls fowl of the cairo issue
What I am having to use is backend_gtk3cairo. However this is being
triggered
 raise ValueError("The Cairo backend can not draw paths longer than 18980
points.")
I am generally plotting 7 x-y plots with upto 30,000 points.
Now for now I have commented this out from my local install, is there a
better/preferred/recommended alternative?
I have read about cairocffi but this doesn't seem conveniently possible at
this moment in time (especially for windows)
Equally I have seen mpl-devel mailing list entries from 4years ago stating
that this check was to be removed (a cairo 1.4.10 issue)
JonRB

I'm trying to do a twiny setup on one of the Axes generated from a
make_axes_locatable().append_axes() call. The new axis generated from
twiny() seems to span the entire window though. Here's the code:
from matplotlib.pyplot import *
import numpy as np
from mpl_toolkits.axes_grid1 import make_axes_locatable
ax_c = subplot(111)
ax_c.plot(np.linspace(0,10))
divider = make_axes_locatable(ax_c)
ax_t = divider.append_axes("top", size=1.2, pad=0.1, sharex=ax_c)
ax_r = divider.append_axes("right", size=1.2, pad=0.1, sharey=ax_c)
ax_r.plot(np.linspace(0,50))
ax_t.plot(np.linspace(0,25))
ax_ty = ax_r.twiny()
ax_ty.plot(np.linspace(-50,0))
show()
If you get the idea of what I'm trying to do, other suggestions involving
AxesGrid, subplots, or otherwise are welcome. AxesGrid seems to require
that I have all four plots in a 2x2 grid (in the above code there are only
3), and using subplots would seemingly require the rightmost plot to span
the height of the other two. There's this:
http://matplotlib.org/examples/pylab_examples/scatter_hist.html but I don't
want to hard-code the dimensions, as the center subplot should change
dimensions as I put in new data...