matplotlib-users Mailing List for matplotlib

On 03/31/2012 04:02 AM, Magician wrote:
> Alexis&  Eric
>
>
> Thanks for your advices.
> I've been trying, but I still have some problems.
>
> I tried matplotlib.matplotlib_fname() and I found my silly mistake.
> Python answered '/usr/local/lib/python2.7/site-packages/matplotlib/mpl-data/matplotlibrc'
> My RC file was named ".matplotlibrc".
> When the prefixed dot removed, it works perfectly.
>
> And I found to change the backends by using matplotlib.use() command.
> I tried all of them, but nothing worked (with errors).
>
> When using matplotlib.get_backend() on pre-installed python2.6,
> it said 'GTKAgg' and matplotlib.pyplot.show() exactly worked.
> So I tried to install PyGTK from source code, but it's fairly complicated.
>
> Is there an easy way to install backends for additionally installed Python?
> My python is v2.7.2.

Can you find CentOS packages for any of the gui toolkits for your python 
version? pygtk, pyqt4, tkinter, wxpython--any of them?  If so, you 
should be just about set.  Only pygtk and tkinter would even require 
rebuilding mpl; pyqt4 and wxpython don't require any mpl extension code.

Eric

>
>
> Magician
>
>
> On 2012/03/27, at 23:04, Alexis Praga wrote:
>
>> You can check you are editing the correct configuration file with (in
>> the Python shell) :
>>>>> import matplotlib
>>>>> matplotlib.matplotlib_fname()
>>
>> You can also try other backends. For a list, see :
>> http://matplotlib.sourceforge.net/faq/usage_faq.html#what-is-a-backend
>>
>> On Tue, Mar 27, 2012 at 2:46 PM, Magician<f_m...@ma...>  wrote:
>>> Thank you, Alexis.
>>>
>>> I try to install PyQt4 and set Qt4Agg just now, but nothing displayed.
>>> Ummm...what's wrong...??
>>>
>>>
>>> Magician
>>>
>>>
>>> On 2012/03/27, at 17:05, Alexis Praga wrote:
>>>
>>>> I had the same problem on Debian.
>>>> Editing the matplotlibrc (should be installed somewhere in your
>>>> systeme) and changing the "backend" variable to Qt4Agg did the trick.
>>>>
>>>>
>>>>
>>>> On Tue, Mar 27, 2012 at 12:14 AM, Magician<f_m...@ma...>  wrote:
>>>>> Hi.
>>>>>
>>>>> I want to install Matplotlib from source code on CentOS.
>>>>> I've been using Matplotlib for a year.
>>>>> But this is the first time for me to install CentOS by myself.
>>>>>
>>>>> I installed CentOS 6.2 in basic install option.
>>>>> Next, I installed NumPy and Matplotlib.
>>>>> .matplotlibrc isn't set.
>>>>>
>>>>> It looks successfully installed, but when I type show() command,
>>>>> nothing appears.
>>>>> I can export PNG image by using savefig() command, so maybe
>>>>> I'm using invalid backend.
>>>>>
>>>>> How can I display plots with show() command?
>>>>>
>>>>>
>>>>> Magician
>>>
>
>
> ------------------------------------------------------------------------------
> This SF email is sponsosred by:
> Try Windows Azure free for 90 days Click Here
> http://p.sf.net/sfu/sfd2d-msazure
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users

Hi,

I'm trying to create a plot, with subplots where each row of x plots have a
common colorbar beneath it. Only the the top row will have titles. I've
tried creating a function to do this but I only achieve partial success.
Here is an image created in another program that I want to duplicate:

http://old.nabble.com/file/p33544950/fig.jpeg 
 
I made several functions to do this. Here's one of them:

def Plot(self,title,plist):
   for k in np.sort(self.vdic.keys()):                                                  
      plt.subplot(5,13,self.window)                                                        
      cs = plt.contourf(22,22,np.squeeze(self.vdic[k]),plist['levels'],              
                           cmap=cm.get_cmap('jet',len(plist['levels'])-1))                                        
      plt.axis('off')                                                             
      if title: plt.title(k,fontsize=tsize)                                       
      window += 1                                                            
  cbar = plt.colorbar(cax=plist['cax'],orientation='h')                           
                    
I've given up in getting the text on the left because every attempt using
text fails.
Now if this is a horrible way and you have a better idea, please feel free
to share.
I'm new at matplotlib and this is a great way to see how things can be done
better
and in different ways. 
-- 
View this message in context: http://old.nabble.com/Subplot-array-and-colorbar-tp33544950p33544950.html
Sent from the matplotlib - users mailing list archive at Nabble.com.

How did you install Python 2.7? None of my windows machines have ever
hand any problem finding it when I installed from the official
binaries found at python.org.

-paul

On Fri, Mar 30, 2012 at 9:56 AM, Mateusz J Burgunder
<mbu...@we...> wrote:
> Hello,
>
> I am trying to download matplot (matplotlib-1.1.0) but at the start of the
> download I get a screen that says "Python version 2.7 required, which was
> not found in the registry."
> I have python 2.7. Where exactly should I save mathplotlib so that it can
> find python for the installation?
>
> Many thanks,
> Matt.
>
> ------------------------------------------------------------------------------
> This SF email is sponsosred by:
> Try Windows Azure free for 90 days Click Here
> http://p.sf.net/sfu/sfd2d-msazure
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

On Fri, Mar 30, 2012 at 12:25 PM, eoj <jos...@gm...> wrote:

>
> Basically the problem is like this. I have a relatively expensive (time
> wise)
> figure to create, specifically a map with lots of detail in it. On top of
> that, I'm  making an inset set of axes to highlight some regions. I'm
> having
> to recreate the base of the map, which is static, every time I want to make
> an inset for a different region which is taking forever. What I want to do
> is something like this:
>
> fig = figure()
>
> #do stuff that makes the expensive figure
>
> for region in regions:
>    fig2 = copy.copy(fig)
>    ax2 = fig.add_axes([0.1, 0.15, 0.25, 0.25])
>    ax2.fill(x1,y1)
>    savefig(region_name)
>    close()
>
>
>
> The problem is that the clf() clear figure function seems to clear the base
> of the map off, even if I try to make a copy of it inside a loop that is
> generating the insets. Also, close() seems to close fig and not fig2. Does
> this rambling make any sense, and if so, any suggestions?
>
>
If all your additions are confined to the inset axes, you can use
`fig.delaxes` to remove the axes from the figure (see example below). If
you want to save and restore, as you describe above, you should (in
principal) be able to do so with `canvas.copy_from_bbox` and
`canvas.restore_region`, but I couldn't get it to work (see bottom of the
animation cookbook <http://www.scipy.org/Cookbook/Matplotlib/Animations>).

Cheers,
-Tony

# ~~~ example
import numpy as np
import matplotlib.pyplot as plt

fig, ax = plt.subplots()
ax.imshow(np.random.uniform(size=(10, 10)))

ax_inset = fig.add_axes([0.3, 0.3, 0.2, 0.2])
ax_inset.plot([0, 1])
plt.savefig('plot0')

fig.delaxes(ax_inset)
ax_inset = fig.add_axes([0.5, 0.5, 0.2, 0.2])
ax_inset.plot([1, 0])
plt.savefig('plot1')
# ~~~

Alexis & Eric


Thanks for your advices.
I've been trying, but I still have some problems.

I tried matplotlib.matplotlib_fname() and I found my silly mistake.
Python answered '/usr/local/lib/python2.7/site-packages/matplotlib/mpl-data/matplotlibrc'
My RC file was named ".matplotlibrc".
When the prefixed dot removed, it works perfectly.

And I found to change the backends by using matplotlib.use() command.
I tried all of them, but nothing worked (with errors).

When using matplotlib.get_backend() on pre-installed python2.6,
it said 'GTKAgg' and matplotlib.pyplot.show() exactly worked.
So I tried to install PyGTK from source code, but it's fairly complicated.

Is there an easy way to install backends for additionally installed Python?
My python is v2.7.2.


Magician


On 2012/03/27, at 23:04, Alexis Praga wrote:

> You can check you are editing the correct configuration file with (in
> the Python shell) :
>>>> import matplotlib
>>>> matplotlib.matplotlib_fname()
> 
> You can also try other backends. For a list, see :
> http://matplotlib.sourceforge.net/faq/usage_faq.html#what-is-a-backend
> 
> On Tue, Mar 27, 2012 at 2:46 PM, Magician <f_m...@ma...> wrote:
>> Thank you, Alexis.
>> 
>> I try to install PyQt4 and set Qt4Agg just now, but nothing displayed.
>> Ummm...what's wrong...??
>> 
>> 
>> Magician
>> 
>> 
>> On 2012/03/27, at 17:05, Alexis Praga wrote:
>> 
>>> I had the same problem on Debian.
>>> Editing the matplotlibrc (should be installed somewhere in your
>>> systeme) and changing the "backend" variable to Qt4Agg did the trick.
>>> 
>>> 
>>> 
>>> On Tue, Mar 27, 2012 at 12:14 AM, Magician <f_m...@ma...> wrote:
>>>> Hi.
>>>> 
>>>> I want to install Matplotlib from source code on CentOS.
>>>> I've been using Matplotlib for a year.
>>>> But this is the first time for me to install CentOS by myself.
>>>> 
>>>> I installed CentOS 6.2 in basic install option.
>>>> Next, I installed NumPy and Matplotlib.
>>>> .matplotlibrc isn't set.
>>>> 
>>>> It looks successfully installed, but when I type show() command,
>>>> nothing appears.
>>>> I can export PNG image by using savefig() command, so maybe
>>>> I'm using invalid backend.
>>>> 
>>>> How can I display plots with show() command?
>>>> 
>>>> 
>>>> Magician
>> 

Hi, I previously installed basemap by using the yum command. This installed
version 0.99.4. I want to install the latest version so I can use shaded
relief etc. This may be more of a linux problem but as I am more familiar
with python than linux I thought someone here may be able to help.
Following the website instructions (
http://matplotlib.github.com/basemap/users/installing.html) I downloaded
the latest version and untarred it. Then in the basemap directory (which
contains geos-3.2.0) I try to set the environment variable GEOS_DIR to
point to the location of libgeos_c and geos_c.h.
I use the find command to locate the files,
*find / -name geos_c.h* returns the location of that file as *
/usr/lib/basemap-1.0.1/geos-3.2.0/capi/geos_c.h*
and
*find / -name libgeos**
returns
*/libgeos_c_la-geos_c.Plo
/usr/lib/libgeos-3.3.1.so
/usr/lib/libgeos_c.so.1.7.1
/usr/lib/libgeos_c.so.1*
so I set GEOS_DIR to /usr/lib    (not sure if this is correct).
I then cd to the basemap directory and run,
python setup.py install

[davcra@David basemap-1.0.1]$ sudo python setup.py install
[sudo] password for davcra:
checking for GEOS lib in /root ....
checking for GEOS lib in /usr ....
checking for GEOS lib in /usr/local ....
checking for GEOS lib in /sw ....
checking for GEOS lib in /opt ....
checking for GEOS lib in /opt/local ....

Can't find geos library . Please set the
environment variable GEOS_DIR to point to the location
where geos is installed (for example, if geos_c.h
is in /usr/local/include, and libgeos_c is in /usr/local/lib,
set GEOS_DIR to /usr/local), or edit the setup.py script
manually and set the variable GEOS_dir (right after the line
that says "set GEOS_dir manually here".

The problem seems to be with GEOS_DIR but I am not sure what I should set
it to.
Thanks
D