matplotlib-users Mailing List for matplotlib

Louis Pecora wrote:
> I have looked in the User's Guide for matplotlib, but couldn't find 
> anything on setting the aspect ratio.  Can anyone point me to some info 
> online?  I will continue to look.  Thanks.
> 

Each axes object has the following method (with only the docstring shown 
here):


     def set_aspect(self, aspect, adjustable=None, anchor=None):
         """
         aspect:
            'auto'   -  automatic; fill position rectangle with data
            'normal' -  same as 'auto'; deprecated
            'equal'  -  same scaling from data to plot units for x and y
             num     -  a circle will be stretched such that the height
                        is num times the width. aspect=1 is the same as
                        aspect='equal'.

         adjustable:
             'box'      - change physical size of axes
             'datalim'  - change xlim or ylim

         anchor:
             'C'     - centered
             'SW'    - lower left corner
             'S'     - middle of bottom edge
             'SE'    - lower right corner
                  etc.

         ACCEPTS: ['auto' | 'equal' | aspect_ratio]
         """


Is this what you are looking for?

Eric

Is it possible to combine the dashed, dot-dashed, and dotted line styles 
with a linestyle='steps' keyword argument?
-- 

R. Padraic Springuel
Teaching Assistant
Department of Physics and Astronomy
University of Maine
Bennett 309
Office Hours: By Appointment only during the Summer

I found how to explicitly set the x-axis using the following command:

figure.gca().set_xlim([min, max])

-Roberto.

On 9/6/06, Roberto Aguilar <rob...@gm...> wrote:
> Hello,
>
> I'm creating a program that plots data in real-time.  I  want the
> x-axis to be the time in HH:MM:SS.  I'm still playing with the date
> formatters, but have run into a problem where it seems the axis puts
> in more points on the axis to make the plot fit nicely.  For instance,
> I want to have 120 data points (seconds) on the graph.  Initially, the
> x-axis starts at, say 0 and goes to 120 (I'd expect this to be 119).
> The following second the x-axis should go from 1 to 120, then 2 to
> 121, etc.  But instead, the x-axis goes from 0 to 140.  Once 141
> seconds have passed by, the axis shifts and goes from 20 to 160.
>
> Is there any way to make the axis behave so that it keeps just 120
> values on the axis and increment the values as described above?
>
> Thanks!
> -Roberto.
>

I have looked in the User's Guide for matplotlib, but couldn't find 
anything on setting the aspect ratio.  Can anyone point me to some info 
online?  I will continue to look.  Thanks.

-- 
Cheers,

Lou Pecora

Code 6362
Naval Research Lab
Washington, DC  20375
USA
Ph:  +202-767-6002
email:  pe...@an...

I am interested in making an 'interactive mask.'  That is, I am  
creating a model of estuarine flow, where the grid is rectangular,  
and part of the domain will be land, not included in the simulation  
through a mask.  I would like to be able to modify this mask using a  
tool that will allow me to click cells on and off.

I can think of a few ways to do this, but I thought I would ask y'all  
first.  A rough outline of the code would be:

1.  pcolor the grid
2.  Catch clicks in the figure, and determine which cell is clicked.
3. Toggle the masking of that cell, and re-draw the figure

Has anybody done this?

Any ideas about any of the parts?  I think I can handle part 1.  I'm  
worried part 3 might be inefficient.

-Rob

----
Rob Hetland, Associate Professor
Dept. of Oceanography, Texas A&M University
http://pong.tamu.edu/~rob
phone: 979-458-0096, fax: 979-845-6331

I suggest using masked arrays to ensure you are only trying to plot real 
numbers:

def f(x):
     y = log(x)
     ygood = (y < 1e38) & (y > -1e-38)
     yy = nx.ma.masked_where(ygood == 0, y)
     return yy

Note the parentheses and peculiar use of bitwise-and in the definition 
of ygood.  This is a hack to get around the fact that the logical-and 
operator in python cannot be overloaded at present, and so is not 
available in numpy.

Eric

Davidlohr Bueso A. wrote:
> Hi all,
> 
> I'm having trouble plotting functions were the domain aren't the real
> numbers (R). Functions like x**-n, log(x), etc. Does anyone know if
> there's a simple way of solving this problem. Here's a little script and
> it's error:
> 
> from pylab import *
> 
> def f(x):
>         return log(x)
> 
> x = arange(-3, 4)
> plot(x, f(x))
> show()

Christian Meesters wrote:
> I you don't need to use svn, you might give this build a try:
> http://pythonmac.org/packages/py24-fat/index.html

Or the latest build, which is now at:

http://euclid.uits.iupui.edu/mplfiles/

You'll need:

matplotlib-0.87.5-py2.4-macosx-10.4-fat.egg

and:

numpy-1.0b5-py2.4-macosx-10.4-fat.egg

(if you want to use numpy)

Charlie: I think we should give those to Bob I to put on the pythonmac site.

-Chris




-- 
Christopher Barker, Ph.D.
Oceanographer
                                     		
NOAA/OR&R/HAZMAT         (206) 526-6959   voice
7600 Sand Point Way NE   (206) 526-6329   fax
Seattle, WA  98115       (206) 526-6317   main reception

Chr...@no...

I am building matplotlib on an Intel Mac, and trying to use py2app to  
generate mpkg files. Everything seems to go well, except that when I  
go to install the package, it says that there is nothing to install.  
The package seems to be there, but is grayed out with "Skip" in the  
action column:

http://trichech.us/images/mpkg.png

Anyone else encounter this problem?

Thanks,
--
Christopher Fonnesbeck
+ Atlanta, GA
+ fonnesbeck at mac.com
+ Contact me on AOL IM using email address

This question was asked on this list yesterday. You need to install 
numpy-1.0b5.

Darren

On Friday 08 September 2006 09:52, Jean_Francois Moulin wrote:
> I tried installing the 0.87.5 version of matplotlib and this is what I get
> when running a routine that worked under 0.87.3. Any clue?
> TIA
> JF
>
> >pythonw -u "image_rx2_3.py"
>
> Traceback (most recent call last):
>   File "image_rx2_3.py", line 1, in ?
>     from pylab import *
>   File "C:\Python24\Lib\site-packages\pylab.py", line 1, in ?
>     from matplotlib.pylab import *
>   File "C:\Python24\Lib\site-packages\matplotlib\pylab.py", line 196, in ?
>     import cm
>   File "C:\Python24\Lib\site-packages\matplotlib\cm.py", line 5, in ?
>     import colors
>   File "C:\Python24\Lib\site-packages\matplotlib\colors.py", line 33, in ?
>     from numerix import array, arange, take, put, Float, Int, where, \
>   File "C:\Python24\Lib\site-packages\matplotlib\numerix\__init__.py", line
> 145, in ? __import__('fft', g, l)
>   File "C:\Python24\Lib\site-packages\matplotlib\numerix\fft\__init__.py",
> line 11, in ? from numpy.dft.old import *
> ImportError: No module named old
>
> >Exit code: 1
>
> -------------------------------------------------------------------------
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-- 
Darren S. Dale, Ph.D.
Cornell High Energy Synchrotron Source
Cornell University
200L Wilson Lab
Rt. 366 & Pine Tree Road
Ithaca, NY 14853

dd...@co...
office: (607) 255-3819
fax: (607) 255-9001

I tried installing the 0.87.5 version of matplotlib and this is what I get when running a routine that worked under 0.87.3.
Any clue?
TIA
JF

>pythonw -u "image_rx2_3.py"
Traceback (most recent call last):
  File "image_rx2_3.py", line 1, in ?
    from pylab import *
  File "C:\Python24\Lib\site-packages\pylab.py", line 1, in ?
    from matplotlib.pylab import *
  File "C:\Python24\Lib\site-packages\matplotlib\pylab.py", line 196, in ?
    import cm
  File "C:\Python24\Lib\site-packages\matplotlib\cm.py", line 5, in ?
    import colors
  File "C:\Python24\Lib\site-packages\matplotlib\colors.py", line 33, in ?
    from numerix import array, arange, take, put, Float, Int, where, \
  File "C:\Python24\Lib\site-packages\matplotlib\numerix\__init__.py", line 145, in ?
    __import__('fft', g, l)
  File "C:\Python24\Lib\site-packages\matplotlib\numerix\fft\__init__.py", line 11, in ?
    from numpy.dft.old import * 
ImportError: No module named old
>Exit code: 1

Hi all!

I have a small problem with the legend() stuff...
when plotting several lines 
like in:
....
name=0
for curve in data:
    plot(curve[0],curve[1],label=str(name))
    name+=1
legend()
show()

the first two curves appear with a label but without the line represented in the legend box.
Moreover the label used for the first two lines is always line0 and line1, whatever the label I actually create. I was able to fix this by creating a label list and unvoking legend(label_list) but this did not work for the lines...
any clue??
PS I am running 0.87.3 (problems installing 0.87.5 see next post)

Thanks in advance JF

Hi,

I you don't need to use svn, you might give this build a try:
http://pythonmac.org/packages/py24-fat/index.html

Christian

I just built svn 2761 on linux, and didnt find any problems.

Darren


On Friday 08 September 2006 08:39, lis...@ma... wrote:
> I have built matplotlib from svn this morning (trunk), which was
>
> successful, but when I go to import anything, it fails:
>  >>> import pylab
>
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
>    File "/Library/Frameworks/Python.framework/Versions/2.4/lib/
> python2.4/site-packages/pylab.py", line 1, in ?
>      from matplotlib.pylab import *
> ImportError: No module named matplotlib.pylab
>
>  >>> import matplotlib
>
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> ImportError: No module named matplotlib
>
> However, when I look in my site-packages directory, matplotlib is
> clearly there:
>
> Osoyoos:~ chris$ ls /Library/Frameworks/Python.framework/Versions/2.4/
> lib/python2.4/site-packages
> README                                  modulegraph-0.7-py2.4.egg
> activestate.py                          numpy
> altgraph-0.6.7-py2.4.egg                numpy-1.0rc1.dev3136-
> py2.4.egg-info
> bdist_mpkg-0.4.2-py2.4.egg              py2app-0.3.4-py2.4.egg
> easy-install.pth                        pylab.py
> macholib-1.1-py2.4.egg                  pylab.pyc
> matplotlib                              pylab.pyo
> matplotlib-0.87.5_r2761-py2.4-nspkg.pth setuptools-0.6c2-py2.4.egg
> matplotlib-0.87.5_r2761-py2.4.egg-info  setuptools.pth
>
> I'm running on OS X using Python 2.4.3.
>
> Any ideas? Thanks.
>
> --
> Christopher Fonnesbeck
> + Atlanta, GA
> + fonnesbeck at mac.com
> + Contact me on AOL IM using email address
>
>
>
> -------------------------------------------------------------------------
> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job
> easier Download IBM WebSphere Application Server v.1.0.1 based on Apache
> Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users

-- 
Darren S. Dale, Ph.D.
Cornell High Energy Synchrotron Source
Cornell University
200L Wilson Lab
Rt. 366 & Pine Tree Road
Ithaca, NY 14853

dd...@co...
office: (607) 255-3819
fax: (607) 255-9001

I have built matplotlib from svn this morning (trunk), which was  
successful, but when I go to import anything, it fails:

 >>> import pylab
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ 
python2.4/site-packages/pylab.py", line 1, in ?
     from matplotlib.pylab import *
ImportError: No module named matplotlib.pylab
 >>> import matplotlib
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
ImportError: No module named matplotlib

However, when I look in my site-packages directory, matplotlib is  
clearly there:

Osoyoos:~ chris$ ls /Library/Frameworks/Python.framework/Versions/2.4/ 
lib/python2.4/site-packages
README                                  modulegraph-0.7-py2.4.egg
activestate.py                          numpy
altgraph-0.6.7-py2.4.egg                numpy-1.0rc1.dev3136- 
py2.4.egg-info
bdist_mpkg-0.4.2-py2.4.egg              py2app-0.3.4-py2.4.egg
easy-install.pth                        pylab.py
macholib-1.1-py2.4.egg                  pylab.pyc
matplotlib                              pylab.pyo
matplotlib-0.87.5_r2761-py2.4-nspkg.pth setuptools-0.6c2-py2.4.egg
matplotlib-0.87.5_r2761-py2.4.egg-info  setuptools.pth

I'm running on OS X using Python 2.4.3.

Any ideas? Thanks.

--
Christopher Fonnesbeck
+ Atlanta, GA
+ fonnesbeck at mac.com
+ Contact me on AOL IM using email address

On 7-Sep-06, at 12:05 PM, Christopher Barker wrote:

> Kevin Horton wrote:
>
>>  I also want to note that the GTK
>> backend is useful to some people, and hope that it will continue to
>> be supported (I seem to recall one mention that it was little used).
>
> This is a good point. In general, the Agg back-ends produce nicer an
> more consistent results, and, on local machines, performance is just
> fine, but in a remote X-session, there are real advantages to using X
> for the rendering. The same probably applies to the TK and Wx back- 
> ends
> also.

Thanks for the explanation on the difference in these backends.

I did notice many artifacts in the plots when using the GTK backend,  
especially when only setting xmin and xmax to only display a small  
portion of the data .  Is this a known problem?  Is there interest in  
correcting it, and if so, is there any information I can provide to  
assist, or any testing I can do?

Kevin Horton
Ottawa, Canada