matplotlib-users Mailing List for matplotlib

Hi,
I had a look through the archives but couldn't find an answer to this.
Using the tkagg backend (agg is fine) I get a segmentation fault 
doing a simple plot.
gdb returns the following:
362 Point* ll_api() {return _ll;}
Current language: auto; currently c++
(gdb) bt
#0 0xb6fc1bac in PyAggImagePhoto (clientdata=0x0, interp=0x87a9430, 
argc=5,
 argv=0xbf97fc9c) at src/_transforms.h:362
#1 0xb712ea5c in TclInvokeStringCommand () from /usr/lib/libtcl8.4.so
#2 0xb712ff05 in TclEvalObjvInternal () from /usr/lib/libtcl8.4.so
#3 0xb7131015 in Tcl_EvalObjv () from /usr/lib/libtcl8.4.so
#4 0xb73d34a6 in ?? () from /usr/lib/python2.5/lib-dynload/_tkinter.so
snip
This is matplotlib-0.91.2, python 2.5 on linux (opensuse 10.3)
Cheers,
Malte.

learn and survive... :)
thanks Jouni and Christopher!
Johann
Jouni K. Seppänen wrote:
> Johann Cohen-Tanugi
> <co...@sl...> writes:
>
> 
>> I have a function, which I am plotting. I want to add a line positioned 
>> at, say, the mean of the function, so I want to do plot([x,x],[y0,y1]).
>> 
>
> Try axvline(x).
>
> 

Johann Cohen-Tanugi
<co...@sl...> writes:
> I have a function, which I am plotting. I want to add a line positioned 
> at, say, the mean of the function, so I want to do plot([x,x],[y0,y1]).
Try axvline(x).
-- 
Jouni K. Seppänen
http://www.iki.fi/jks

Neal Becker <ndb...@gm...> writes:
> To produce a batch of pdfs, I'm using:
[...]
> Works, but causes my display to flash, I think each time either close() or
> figure() is called (not sure which). Any better way?
To avoid opening a window at all, use a non-interactive backend by
putting something like the following at the start of your script,
_before_ importing anything else:
import matplotlib
matplotlib.use('pdf')
-- 
Jouni K. Seppänen
http://www.iki.fi/jks

Hi Johann,
try:
a,b = ylim()
> I have a function, which I am plotting. I want to add a line positioned 
> at, say, the mean of the function, so I want to do plot([x,x],[y0,y1]).
> In order to get y0, and y1, my brute force trial and error browsing of 
> the API lead me to :
> y0=gca().yaxis.get_majorticklabels()[0].get_position()[1]
> y1=gca().yaxis.get_majorticklabels()[-1].get_position()[1]
> 
> .... and as I am never contented, I now ask : is it really the manner of 
> choice to get this information. I sense that I did not take the 
> straightest path to get it :)

To produce a batch of pdfs, I'm using:
close ()
figure (1, figsize=(11,8))
...
savefig (open (whatever, 'w'))
Works, but causes my display to flash, I think each time either close() or
figure() is called (not sure which). Any better way?

hello,
I have a function, which I am plotting. I want to add a line positioned 
at, say, the mean of the function, so I want to do plot([x,x],[y0,y1]).
In order to get y0, and y1, my brute force trial and error browsing of 
the API lead me to :
y0=gca().yaxis.get_majorticklabels()[0].get_position()[1]
y1=gca().yaxis.get_majorticklabels()[-1].get_position()[1]
.... and as I am never contented, I now ask : is it really the manner of 
choice to get this information. I sense that I did not take the 
straightest path to get it :)
thanks in advance,
Johann