matplotlib-devel Mailing List for matplotlib

Stumbled across this today https://code.google.com/p/mplh5canvas/
It hasn't had a commit in 18mos and I have not tried it, but I am just
making sure the community is aware of it's existence.
Tom

And with my continuing saga of backend-specific things...
I was using conda, but because it does not ship with pygtk support, I had
to manually install pygtk into the conda environment and then install
matplotlib from source. All that seemed to work fine when I worked on Wx
and Gtk examples for my book.
I went back to a (previously working) Tk example to polish it, and I get
all sorts of errors now. I have tried multiple releases of matplotlib from
source (doing a git clean -fxd between them), all with similar errors. In
fact, with master, the error causes a segfault:
ben@tigger:~/Documents/InteractiveMPL$ python chp5/slider_tk.py
Exception in Tkinter callback
Traceback (most recent call last):
 File "/home/ben/miniconda/lib/python2.7/lib-tk/Tkinter.py", line 1486, in
__call__
 return self.func(*args)
 File
"/home/ben/miniconda/lib/python2.7/site-packages/matplotlib-1.5.x-py2.7-linux-x86_64.egg/matplotlib/backends/backend_tkagg.py",
line 278, in resize
 self.show()
 File
"/home/ben/miniconda/lib/python2.7/site-packages/matplotlib-1.5.x-py2.7-linux-x86_64.egg/matplotlib/backends/backend_tkagg.py",
line 350, in draw
 tkagg.blit(self._tkphoto, self.renderer._renderer, colormode=2)
 File
"/home/ben/miniconda/lib/python2.7/site-packages/matplotlib-1.5.x-py2.7-linux-x86_64.egg/matplotlib/backends/tkagg.py",
line 30, in blit
 id(data), colormode, id(bbox_array))
TclError
alloc: invalid block: 0x2cfe3b0: 0 0
Aborted (core dumped)
The line in question is (at least in v1.3.1, it is slightly different in
more recent versions):
tk.call("PyAggImagePhoto", photoimage, id(aggimage), colormode,
id(bbox_array))
This happens regardless of what example I use (my own or otherwise). There
is no blit-specific code in the examples. All of this worked with the
conda-supplied matplotlib, but never the
from-source-into-a-conda-environment install.
Thoughts?
Ben Root

On 2014年11月16日, 10:21 AM, j1 wrote:
> I have posted this in the user sub forum as well because i'm not sure that it
> is a user issue or development issue.
> Information about my problem and my code are here
>
> http://matplotlib.1069221.n5.nabble.com/Assign-labels-to-colorbar-extensions-user-or-development-issue-td44392.html
> <http://matplotlib.1069221.n5.nabble.com/Assign-labels-to-colorbar-extensions-user-or-development-issue-td44392.html>
>
> Is it possible to assign tick labels/values to extensions?
You would have to do it manually; you can put marks and text anywhere 
you want in a matplotlib figure, but there is no mechanism for adding 
ticks to the extensions. That's simply not what they are for. They are 
intended only to indicate a single color to which values outside the 
vmin-to-vmax range of the norm are assigned.
>
> If so, how can I do it
It looks like you might be able to achieve what you want *without* using 
extensions, by using a custom colormap and/or norm. You would extend 
the actual contour levels to include the full range you want "ticked and 
labeled", but you would use the colormap and/or norm to ensure those 
beyond a given range are mapped to the appropriate end color(s).
Eric

I have posted this in the user sub forum as well because i'm not sure that it
is a user issue or development issue. 
Information about my problem and my code are here
http://matplotlib.1069221.n5.nabble.com/Assign-labels-to-colorbar-extensions-user-or-development-issue-td44392.html
<http://matplotlib.1069221.n5.nabble.com/Assign-labels-to-colorbar-extensions-user-or-development-issue-td44392.html> 
Is it possible to assign tick labels/values to extensions?
If so, how can I do it
--
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