matplotlib-users Mailing List for matplotlib

Hello NG,
 first of all, I would like to thank you a for your kind support. I ca=
me
across a couple of problems using Matplotlib/Pylab, and I would like to
ask if someone else has encountered them or if I am missing something.
First of all, I am on a WinXP, with:
- Python 2.3.4
- wxPython 2.5.3.1
- Numeric 23.7
- I use WXAgg
- Matplotlib/Pylab 0.72.1
Problem 1:
I have downloaded the examples at:
 
http://matplotlib.sourceforge.net/matplotlib_examples_0.72.zip
If, for example, I try to run the keypress_demo.py, and if I resize the
window "too fast" (but it's not really fast, is just a normal resize), I
get an unhandled exception like:
"An unhandled exception occurred. Press "Abort" to terminate the program,=
"Retry" to exit the program normally and "Ignore" to try to continue."
No matter which is my choice, the window crashes and I get the usual XP
message about sending error messages to Microsoft and so on. It is a stra=
nge
exception, if I resize the window VERY slowly, there is no exception (usu=
ally).
Problem 2:
Considering always the keypress_demo.py, if I run it (without resizing th=
e
window ;-) ) and I press the key "g" (for the grid), the grid appears and=
suddenly disappears. I opened the keypress_demo.py and I commented out th=
e
draw() command (that follows the grid() command), and now the grid does
not disappear. What could be the problem with draw()?!? I have to use it
in my application, but I am not able to display the grid...
Thank your for every suggestion, and sorry for the long post.
Andrea.

Hi Andrea
Data inputs in plot must be lists or arrays. So
instead of :
plot( x[i] , y[i] )
you must write
plot( [x[i]] , [y[i]] )
Kristen
--- and...@ti... wrote:
> Hello NG,
> 
> I am trying to plot a series of point (in a
> wxPython window). Everything
> works if I plot all the points together, as:
> 
> myreference = plot(x, y, 'ko')
> 
> But I would like to plot 1 point at a time, and to
> keep a "plot reference"
> of every point, because I will have to be able to
> interact with every single
> point (and not with all of them) separately, using
> the mpl_connect functions.
> If I try to plot a single point, matplotlib/pylab
> returns me an error like:
> 
> File "D:\MyProjects\globall\SummaryPanel.py", line
> 169, in CreateWellMap
> mp = axdata.plot(xc[cc], yc[cc], "ko")
> File
> "C:\Python23\Lib\site-packages\matplotlib\axes.py",
> line 2324, in
> plot
> for line in self._get_lines(*args, **kwargs):
> File
> "C:\Python23\Lib\site-packages\matplotlib\axes.py",
> line 276, in
> _grab_ne
> xt_args
> yield self._plot_3_args(remaining, **kwargs)
> File
> "C:\Python23\Lib\site-packages\matplotlib\axes.py",
> line 238, in
> _plot_3_
> args
> assert(iterable(x))
> AssertionError
> 
> 
> Does anyone have a suggestion? Thank you very much.
> 
> Andrea.
> 
> 
> 
> 
>
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Hello NG,
 I am trying to plot a series of point (in a wxPython window). Everyth=
ing
works if I plot all the points together, as:
myreference =3D plot(x, y, 'ko')
But I would like to plot 1 point at a time, and to keep a "plot reference=
"
of every point, because I will have to be able to interact with every sin=
gle
point (and not with all of them) separately, using the mpl_connect functi=
ons.
If I try to plot a single point, matplotlib/pylab returns me an error lik=
e:
 File "D:\MyProjects\globall\SummaryPanel.py", line 169, in CreateWellMa=
p
 mp =3D axdata.plot(xc[cc], yc[cc], "ko")
 File "C:\Python23\Lib\site-packages\matplotlib\axes.py", line 2324, in
plot
 for line in self._get_lines(*args, **kwargs):
 File "C:\Python23\Lib\site-packages\matplotlib\axes.py", line 276, in
_grab_ne
xt_args
 yield self._plot_3_args(remaining, **kwargs)
 File "C:\Python23\Lib\site-packages\matplotlib\axes.py", line 238, in
_plot_3_
args
 assert(iterable(x))
AssertionError
Does anyone have a suggestion? Thank you very much.
Andrea.