[Matplotlib-users] Relpos only works once when using FancyArrow for annotation

2011-11-28 Thread Markus Baden 
Hi list,

I'm trying to annotate points on a graph by drawing a simple line from the
point on the axis to the top left corner of the text. I can't figure out,
how to use pyplot.annotate so that it turns of the arrow head and I can use
horizontalalignment (ha) and verticalalignment (va). When I use
arrowstyle='-' in the arrowprops dictionary ha and va don't work. Instead I
use relpos=(0, 1) in the arrowprops dictionary, which works, but only when
I call the annotate function the first time. Below is a minimal example.

I'm using mpl version 1.0. as part of EPD 7.1 on Mac OS X 10.5.

Any hints on how to achieve my goal would be greatly appreciated!

Best regards,

Markus

---

The following code reproduces my problem

import numpy as np
import matplotlib.pyplot as plt

data = np.linspace(1,10)
plt.plot(data, data)
anno_args = {
'annotation_clip': False,
'arrowprops': dict(arrowstyle='-', relpos=(0, 1)),
}
plt.annotate('Good relpos', (3, 3), xytext = (3, 2), **anno_args)
plt.annotate('Bad relpos', (6, 6), xytext = (6, 5), **anno_args)
plt.annotate('No ha/va', (5, 5), xytext = (5, 4),
arrowprops=dict(arrowstyle='-'),
 ha='left', va='top')
plt.show()
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Re: [Matplotlib-users] Relpos only works once when using FancyArrow for annotation

2011-11-28 Thread Markus Baden 
 This is a bug. In the current implementation, annotate has a
 side-effect that modifies the arrowprops dictionary.
 As a workaround, you may do,

 arrowprops = dict(arrowstyle='-', relpos=(0, 1))
 plt.annotate('Good relpos', (3, 3), xytext = (3, 2),

 annotation_clip=False, arrowprops=arrowprops.copy())


Works for me. Thanks a lot!



  plt.annotate('No ha/va', (5, 5), xytext = (5, 4),
  arrowprops=dict(arrowstyle='-'),
   ha='left', va='top')
 

 ha and va controls the location of the text relative to the xytext,
 and I believe it does work as expected. It has nothing to do with the
 starting point of the arrow, which should be controlled by the relpos
 parameter.


Thanks for clarifying.

Regards,

Markus
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Re: [Matplotlib-users] Draw only left and top part of frame

2011-04-10 Thread Markus Baden 
Hi Paul,

Thanks a lot. That was exactly what I was looking for!

Best regards,

Markus

On Thu, Apr 7, 2011 at 1:14 AM, Paul Ivanov pivanov...@gmail.com wrote:

 Markus Baden, on 2011-04-06 10:18,  wrote:
  Hi,
 
  I draw four subplots that touch each other. Thus the middle cross of
 the
  frame is drawn twice and appears to be thicker then the outer
 rectangle. I
  came across an old post for an custom Axes that would allow to only draw
  part of the frame
 
 
 http://www.mail-archive.com/matplotlib-users@lists.sourceforge.net/msg10242.html
 
  However, when I run the example provided I get an can't set attribute
  error (see traceback below). I use Python 2.7.1 |EPD 7.0-1 (32-bit) on
 Mac
  OS 10.5.8, which includes matplotlib version 1.0.1.
 
  Is there a fix to get the custom class running again, or is there an
  alternative way to achieve what I intend?

 Hi Markus,

 I didn't look at that code but I think the alternative you're
 looking for is

 ax.spines['right'].set_visible(False)
 ax.spines['bottom'].set_visible(False)

 where you use the appropriate locations you want changed for the
 different subplots axes.

 If you're going to have a lot of subplots, you can simplify the
 logic by first setting all spines to being invisible, and then
 using ax.is_first_col(), is_first_row() and the corresponding
 is_last_* methods to set the appropriate spines back to visible.

 Like this:

 #show only the outside spines
 for ax in all_axes:
for sp in ax.spines.values():
sp.set_visible(False)
if ax.is_first_row():
ax.spines['top'].set_visible(True)
if ax.is_last_row():
ax.spines['bottom'].set_visible(True)
if ax.is_first_col():
ax.spines['left'].set_visible(True)
if ax.is_last_col():
ax.spines['right'].set_visible(True)

 best,
 --
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 http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7

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[Matplotlib-users] Draw only left and top part of frame

2011-04-05 Thread Markus Baden 
Hi,

I draw four subplots that touch each other. Thus the middle cross of the
frame is drawn twice and appears to be thicker then the outer rectangle. I
came across an old post for an custom Axes that would allow to only draw
part of the frame

http://www.mail-archive.com/matplotlib-users@lists.sourceforge.net/msg10242.html

However, when I run the example provided I get an can't set attribute
error (see traceback below). I use Python 2.7.1 |EPD 7.0-1 (32-bit) on Mac
OS 10.5.8, which includes matplotlib version 1.0.1.

Is there a fix to get the custom class running again, or is there an
alternative way to achieve what I intend?

Thanks a lot,

Markus

Traceback (most recent call last):
  File frametest.py, line 165, in module
ax = plt.subplot(sub, projection='frameaxes')
  File
/Library/Frameworks/Python.framework/Versions/7.0/lib/python2.7/site-packages/matplotlib/pyplot.py,
line 658, in subplot
a = fig.add_subplot(*args, **kwargs)
  File
/Library/Frameworks/Python.framework/Versions/7.0/lib/python2.7/site-packages/matplotlib/figure.py,
line 687, in add_subplot
a = subplot_class_factory(projection_class)(self, *args, **kwargs)
  File
/Library/Frameworks/Python.framework/Versions/7.0/lib/python2.7/site-packages/matplotlib/axes.py,
line 8380, in __init__
self._axes_class.__init__(self, fig, self.figbox, **kwargs)
  File
/Library/Frameworks/Python.framework/Versions/7.0/lib/python2.7/site-packages/matplotlib/axes.py,
line 459, in __init__
self.cla()
  File frametest.py, line 138, in cla
self.frame = self._frame
AttributeError: can't set attribute
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Re: [Matplotlib-users] Building matplotlib from source with libpng (png.h) installed via fink on Mac OS X

2010-08-10 Thread Markus Baden 

On Aug 11, 2010, at 6:09 AM, Friedrich Romstedt wrote:

 Are you on OSX 10.5 or 10.6?  I'm asking because it's important for
 others when you're on 10.5 because you're using gcc-4.0 then, while
 10.6 users have at least for non-Python (distutils) compilations
 gcc-4.2 as default.

I'm running Mac OS X 10.5.8.

Markus


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Re: [Matplotlib-users] Building matplotlib from source with libpng (png.h) installed via fink on Mac OS X

2010-08-09 Thread Markus Baden 

On Aug 10, 2010, at 5:34 AM, Friedrich Romstedt wrote:

 2010/8/9 Markus Baden markus.ba...@gmail.com:
 On my Macbook Pro I use Python 2.6 as provided by the Enthought  
 Python
 Distribution. I ran into some problem with Axes3D so I decided to
 upgrade to the latest version from source. While trying that I got a
 similiar error message as discussed in

 http://www.mail-archive.com/matplotlib-users@lists.sourceforge.net/msg12938.html

 i.e. error: png.h: No such file or directory

 In short matplotlib could not find libpng (or png.h from that). I had
 libpng installed via fink in the usual place /sw/include etc. This
 seems to be a quite natural choice, so I wondered why matplotlib does
 not find that out of the box. Following the tips in the above post I
 looked at basedir in setupext.py For some reason the basedirs for
 darwin where commented out. Uncommenting the basedirs did the trick
 for me [1] and matplotlib happily installed with the libpng from  
 fink.

 Hope this will help other mac users. Thanks for the great work on
 matplotlib!

 Thanks for reporting finally a working pure-setup.py installation!

 But are you sure it really works, because mixing binary-distributed
 and self-compiled packages often leads to import refusal, when the
 external libraries (as freetype) are compiled with a different
 compiler than Python.

Thanks for the warning. Not really sure. So far I have seen no  
problems, i.e. can happily plot. How can I make sure that I don't ran  
into those problems? I usually don't mix packages and just hope that  
the EPD guys update to Matplotlib 1.0 soon.

Markus


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[Matplotlib-users] Building matplotlib from source with libpng (png.h) installed via fink on Mac OS X

2010-08-08 Thread Markus Baden 
Hi,

On my Macbook Pro I use Python 2.6 as provided by the Enthought Python  
Distribution. I ran into some problem with Axes3D so I decided to  
upgrade to the latest version from source. While trying that I got a  
similiar error message as discussed in

http://www.mail-archive.com/matplotlib-users@lists.sourceforge.net/msg12938.html

i.e. error: png.h: No such file or directory

In short matplotlib could not find libpng (or png.h from that). I had  
libpng installed via fink in the usual place /sw/include etc. This  
seems to be a quite natural choice, so I wondered why matplotlib does  
not find that out of the box. Following the tips in the above post I  
looked at basedir in setupext.py For some reason the basedirs for  
darwin where commented out. Uncommenting the basedirs did the trick  
for me [1] and matplotlib happily installed with the libpng from fink.

Hope this will help other mac users. Thanks for the great work on  
matplotlib!

Cheers,

Markus



[1] Here the relevant lines for setupext.py

 'darwin' : ['/sw/lib/freetype2', '/sw/lib/freetype219', '/usr/ 
local',
 '/usr', '/sw'],
 # it appears builds with darwin are broken because of all the
 # different flags the deps can be compile with, so I am pushing
 # people to :
 #   make -f make.osx fetch deps mpl_build mpl_install

 #'_darwin' : [],


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