matplotlib-users Mailing List for matplotlib

Thank you all for your help.
Regards,
Sam
Matthias Michler wrote:
> 
> Hi Sam,
> 
> On Monday 28 April 2008 05:09:36 samwo wrote:
>> Hi.
>>
>> I run these codes in ipython command line interface.
>>
>> from pylab import *
>> subplot(211)
>> plot([1,2,3],[1,2,3])
> There is a small typo (or a wrong method):
>> set(gca(), xtickslabel = [])
> needs to be 
> setp(gca(), xticklabels = [])
> 
>> and got the error saying "Type error: set() does not take keyword
>> arguments" My OS is windows XP. The code I used is copied from matplotlib
>> tutorial. Pls help explain why it didnt work.
> 
> regards Matthias
> 
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Hi,
I would like to generate (or simulate) 3D histogram... How I can do this with matplotlib/pylab (if I can) ?
I tried different ways :
 - 2D histogram in 3D but the result is not usable for me (because I have lot of small bars)
 - generation of bars with, for each bar, 5 Polygons but I didn't success (I don't hunderstand the main principle of the 3D module) and it seems to be slow (I must draw approximatively 300 bars)
 - simulation of bars with large lines (like in Gnuplot, see below) but, again, I don't hunderstand the main principle of the 3D module and I don't know how I can plot set of lines in a 3D environment...
Today, I do this with Gnuplot :
>>> splot "hist3D.dat" with boxes linewidth 10
hist.dat :
0 0 3
0 1 2
0 2 5
1 0 1
1 1 4
1 2 1
2 0 5
2 1 2
2 2 3
Does someone have an idea ?
Thanks

Hello,
I have decided to switch to the QtAgg backend because the Designer
software is very appealing. I succeeded in adding a custom widget
representing the FigureCanvasQTAgg, but when I compile the ui file, I
see that it tries to instantiate it as FigureCanvasQTAgg(Parent) where
Parent is the parent widget, which seems to be the standard format for
instantiating widgets. However, FigureCanvasQTAgg expects a figure as
an argument.
I have seen this tutorial:
http://www.scipy.org/Cookbook/Matplotlib/Qt_with_IPython_and_Designer
which suggests making a MatplotlibWidget to wrap the Canvas and set
everything up including the parent. I have written a version of this
for Qt4, but this seems like something that should be included in the
Qt4 backends. Any plans on adding this? I'd be happy to contribute.
Attached is my initial version.
Glenn

hello,
so the freetype.rc is defined with env variables that are supposed to be 
fed in when packaging it. LIBZ seemingly was missing when the fedora 8 
packaging of freetype was done. I added -lz directly to freetype.rc and 
rebuilt successfully matplotlib. I have no clue which mailing list to 
ping for a fedora packaging issue....
Anyway, end of story for this part of the thread....
best,
Johann
John Hunter wrote:
> On Tue, Apr 29, 2008 at 2:06 AM, Johann Cohen-Tanugi
> <co...@sl...> wrote:
> 
>> hi John,
>> for the record, I have a fedora 8 box, and the shipped version of
>> pkgconfig (pkgconfig-0.22-4.fc8) gives me :
>>
>> [cohen@jarrett matplotlib]$ /usr/bin/pkg-config --libs freetype2
>> -lfreetype
>>
>> No -lz here, if I am not wrong in my querying this tool .....
>> 
>
> This looks like the correct incantation, so it appears that your
> proplem is a misconfigured freetype2.pc. You might want to post
> something to the fedora list, or to the free type list, or simply make
> a patch against the pc file. I am not sure who maintains that part.
>
> JDH
> 

cheers,
Johann

Hello
I think that my problem is linked to the data struture that I'm using for
the dates since my error message is : "ValueError: setting an array element
with a sequence."
I use list data structure, the one that you can declare through :
datetime_list = [].
And maybe I souldn't use this type of data structure and another one.
Regards
Johan Mazel
*
*2008年4月29日 Johan Mazel <joh...@gm...>:
> Ok.
> I tried to do the job through the old way and it's working.
> But I have the latest version (0.91.2). Is it possible that my version
> wasn't successfully installed and that an older one is doing the job ?
> Anyway, thanks a lot for the (fast) help.
> Johan
>
> 2008年4月29日 John Hunter <jd...@gm...>:
>
> > On Tue, Apr 29, 2008 at 12:10 PM, Johan Mazel <joh...@gm...>
> > wrote:
> > > When you wrote "import matplotlib.ticker", you meant "from
> > matplotlib.dates
> > > import ticker" ?
> >
> > No sorry, I meant "import matplotlib.ticker as ticker"
> >
> > > I think I have a bug or something because I get an error like
> > "ValueError:
> > > setting an array element with a sequence." with a lot of debug stuff
> > from
> > > python and MatPlotLib
> > > The line concerned is the one where I do
> > plot(datetime_list,data_list).
> > > It's very strange because just before I use "my_datetime.strftime("%d
> > %H %M
> > > %S")" with my_datetime as an element of my list and it works
> > perfectly.
> >
> >
> > Possibly your matplotlib version is a bit old. With the latest
> > release (0.91.2) you can pass sequences of native datetimes in. For
> > older versions, you had to convert your dates to numbers first:
> >
> > import matplotlib.dates as mpldates
> >
> > d = mpldates.date2num(datetime_list)
> > ax.plot_date(d, ydata)
> >
> > JDH
> >
>
>