matplotlib-users Mailing List for matplotlib

>>>>> "David" == David Brown <db...@ya...> writes:
 David> Also, not sure if it's relevant but if I try to continue in
 David> IDLE I sometimes get "too many files open" errors as well
 David> as mostly non-working windows. Any suggestions?
I have seen problems on win32 with repeatedly loading the same
freetype2 font in backend agg. I've implemented several changes in
the next release to fix this. Hopefully they will solve your problem.
Stay tuned...
JDH

I'm using Tkinter as the backend display for
matplotlib and also using IDLE -n. It works fine the
first several times I run it but ends up crashing and
taking down IDLE and pythonw.exe with it after ~10
runs of the script. I know this is not the best way
to use matplotlib right now. Anyway, here's the
plotting part of the script (.matplotlib set to
interactive mode)
if useMatplotlib:
 yrange = 1.5
 wfList = [p1, p2, p3]
 close() # close last plot window if still open
 nplots = len(waveformList)
 i = 0
 for p in wfList:
 i +=1
 subplot(nplots,1,i)
 plot(p, color='#7070a0')
 axis([0, totalPoints, -yrange, yrange])
 ylabel('Volts')
 grid(True)
Here's the eventual error message:
Traceback (most recent call last):
Exception in Tkinter callback
Traceback (most recent call last):
 File "C:\Python23\lib\lib-tk\Tkinter.py", line 1345,
in __call__
 File
"C:\Python23\lib\site-packages\matplotlib\backends\backend_tkagg.py",
line 120, in resize
 File
"C:\Python23\lib\site-packages\matplotlib\backends\backend_tkagg.py",
line 127, in show
 File
"C:\Python23\lib\site-packages\matplotlib\backends\backend_agg.py",
line 342, in draw
 File
"C:\Python23\lib\site-packages\matplotlib\artist.py",
line 88, in draw
 File
"C:\Python23\lib\site-packages\matplotlib\figure.py",
line 83, in _draw
 File
"C:\Python23\lib\site-packages\matplotlib\artist.py",
line 88, in draw
 File
"C:\Python23\lib\site-packages\matplotlib\axes.py",
line 527, in _draw
 File
"C:\Python23\lib\site-packages\matplotlib\artist.py",
line 88, in draw
 File
"C:\Python23\lib\site-packages\matplotlib\axis.py",
line 395, in _draw
 File
"C:\Python23\lib\site-packages\matplotlib\artist.py",
line 88, in draw
 File
"C:\Python23\lib\site-packages\matplotlib\axis.py",
line 93, in _draw
 File
"C:\Python23\lib\site-packages\matplotlib\artist.py",
line 88, in draw
 File
"C:\Python23\lib\site-packages\matplotlib\text.py",
line 87, in _draw
 File
"C:\Python23\lib\site-packages\matplotlib\backends\backend_agg.py",
line 199, in draw_text
 File
"C:\Python23\lib\site-packages\matplotlib\backends\backend_agg.py",
line 227, in compute_text_offsets
 File
"C:\Python23\lib\site-packages\matplotlib\backends\backend_agg.py",
line 257, in _get_agg_font
RuntimeError: Could not load the facefile
 File "C:\Documents and Settings\dlbrown\My
Documents\Python Scripts\gen_nonlinear_error.py", line
114, in ?
 File
"C:\Python23\lib\site-packages\matplotlib\matlab.py",
line 942, in plot
 File
"C:\Python23\lib\site-packages\matplotlib\backends\backend_tkagg.py",
line 46, in draw_if_interactive
 File
"C:\Python23\lib\site-packages\matplotlib\backends\backend_tkagg.py",
line 127, in show
 File
"C:\Python23\lib\site-packages\matplotlib\backends\backend_agg.py",
line 342, in draw
 File
"C:\Python23\lib\site-packages\matplotlib\artist.py",
line 88, in draw
 File
"C:\Python23\lib\site-packages\matplotlib\figure.py",
line 83, in _draw
 File
"C:\Python23\lib\site-packages\matplotlib\artist.py",
line 88, in draw
 File
"C:\Python23\lib\site-packages\matplotlib\axes.py",
line 527, in _draw
 File
"C:\Python23\lib\site-packages\matplotlib\artist.py",
line 88, in draw
 File
"C:\Python23\lib\site-packages\matplotlib\axis.py",
line 395, in _draw
 File
"C:\Python23\lib\site-packages\matplotlib\artist.py",
line 88, in draw
 File
"C:\Python23\lib\site-packages\matplotlib\axis.py",
line 93, in _draw
 File
"C:\Python23\lib\site-packages\matplotlib\artist.py",
line 88, in draw
 File
"C:\Python23\lib\site-packages\matplotlib\text.py",
line 87, in _draw
 File
"C:\Python23\lib\site-packages\matplotlib\backends\backend_agg.py",
line 199, in draw_text
 File
"C:\Python23\lib\site-packages\matplotlib\backends\backend_agg.py",
line 227, in compute_text_offsets
 File
"C:\Python23\lib\site-packages\matplotlib\backends\backend_agg.py",
line 257, in _get_agg_font
RuntimeError: Could not load the facefile
Also, not sure if it's relevant but if I try to
continue in IDLE I sometimes get "too many files open"
errors as well as mostly non-working windows. Any
suggestions?
-- David
	
		
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On Tue, 2004年04月13日 at 10:12, John Hunter wrote:
> >>>>> "Philippe" == Philippe Strauss <phi...@pr...> writes:
> 
> Philippe> Hello, I'm new to matplotlib and this list.
> Philippe> Congratulation to the developers of this great package,
> Philippe> I've been looking for a long while for a good quality
> Philippe> plotting package.
> 
> Philippe> I would like to plot time in hours on the x axis, with
> Philippe> one minor grid per 15 minutes and one major grid per
> Philippe> hour, but I can only see 10 fixed grids on all tutorial
> Philippe> and documentation.
> 
> Philippe> How can I configure that?
> 
> No support for minor and major ticks yet, but I can add it pretty
> quickly, probably for the next release due out soon. I just need a
> little information. How do grids interact with major and minor ticks?
> I know major ticks are generally bigger and are labeled, and minor
> ticks are smaller and not labeled, but I don't know how grid lines are
> usually handled with respect to major and minor ticks. If you have a
> link to a canonical figure which uses major and minor ticks, I can
> follow that example.
> 
> JDH
> 
I've also been playing around with plots versus time (in my case
calendar time) and experimenting with tick style and ticklabel placement
computed as a function of the time span.
I attached a plot of one of my experiments. (This is where the need for
multi-line ticklabels comes from.)
The ticks and ticklabels that one wants differ according to the span of
time plotted. For instance, for multi-year plots, the ticks are no finer
than quarterly, but adjust to monthly, weekly, or daily if the span is
sub-year. The tick placement is, of course, not uniform, because of the
irregularities in the calendar.
I have not experimented with sub-day time-spans of the kind shown by
Philippe.
	-Al Schapira

From: "John Hunter" <jdh...@ac...
> >>>>> "Philippe" == Philippe Strauss <phi...@pr...> writes:
>
> Philippe> Hello, I'm new to matplotlib and this list.
> Philippe> Congratulation to the developers of this great package,
> Philippe> I've been looking for a long while for a good quality
> Philippe> plotting package.
>
> Philippe> I would like to plot time in hours on the x axis, with
> Philippe> one minor grid per 15 minutes and one major grid per
> Philippe> hour, but I can only see 10 fixed grids on all tutorial
> Philippe> and documentation.
>
> Philippe> How can I configure that?
>
> No support for minor and major ticks yet, but I can add it pretty
> quickly, probably for the next release due out soon. I just need a
> little information. How do grids interact with major and minor ticks?
> I know major ticks are generally bigger and are labeled, and minor
> ticks are smaller and not labeled, but I don't know how grid lines are
> usually handled with respect to major and minor ticks. If you have a
> link to a canonical figure which uses major and minor ticks, I can
> follow that example.
>
> JDH
for my application, I need something that looks like Tobias Oetiker
RRD tool graph:
This one is 1h per minor grid and tick, 6h per majors.
Thanks!!

>>>>> "Philippe" == Philippe Strauss <phi...@pr...> writes:
 Philippe> Hello, I'm new to matplotlib and this list.
 Philippe> Congratulation to the developers of this great package,
 Philippe> I've been looking for a long while for a good quality
 Philippe> plotting package.
 Philippe> I would like to plot time in hours on the x axis, with
 Philippe> one minor grid per 15 minutes and one major grid per
 Philippe> hour, but I can only see 10 fixed grids on all tutorial
 Philippe> and documentation.
 Philippe> How can I configure that?
No support for minor and major ticks yet, but I can add it pretty
quickly, probably for the next release due out soon. I just need a
little information. How do grids interact with major and minor ticks?
I know major ticks are generally bigger and are labeled, and minor
ticks are smaller and not labeled, but I don't know how grid lines are
usually handled with respect to major and minor ticks. If you have a
link to a canonical figure which uses major and minor ticks, I can
follow that example.
JDH

Hello, I'm new to matplotlib and this list.
Congratulation to the developers of this great package, I've been looking
for
a long while for a good quality plotting package.
I would like to plot time in hours on the x axis, with one minor
grid per 15 minutes and one major grid per hour, but I can only see
10 fixed grids on all tutorial and documentation.
How can I configure that?
--
Philippe Strauss