[Matplotlib-users] Grid problem?
When I try to turn on the grid for just one axis, seemingly in perfect
accordance with the documentation at
http://matplotlib.sourceforge.net/api/axes_api.html#matplotlib.axes.Axes.grid
it seems like there is a problem. I am able to make a graph, but trying to
turn on the grid for just one axis causes an error.
My commands are pasted below.
Am I doing this wrong? I am doing the best I can to follow the documentation
exactly.
Thanks for any help!
import matplotlib
matplotlib.use('MacOSX')
import matplotlib.pyplot as plt
fig=plt.figure()
ax=fig.add_subplot(111)
ax.plot([1,2,3])
ax.set_xlabel('Hi there')
ax.grid(True, axis='x')
bombayduck:~$ python
Python 2.6.5 (r265:79359, Mar 24 2010, 01:32:55)
[GCC 4.0.1 (Apple Inc. build 5493)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib
>>> matplotlib.use('MacOSX')
>>> import matplotlib.pyplot as plt
>>> fig=plt.figure()
>>> ax=fig.add_subplot(111)
>>> ax.plot([1,2,3])
[]
>>> ax.set_xlabel('Hi there')
>>> ax.grid(True, axis='x')
Traceback (most recent call last):
File "", line 1, in
File
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/axes.py",
line 1823, in grid
self.xaxis.grid(b, **kwargs)
File
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/axis.py",
line 965, in grid
if len(kwargs): artist.setp(tick.gridline,**kwargs)
File
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/artist.py",
line 1169, in setp
func = getattr(o,funcName)
AttributeError: 'Line2D' object has no attribute 'set_axis'
-dave--
A neuroscientist is at the video arcade, when someone makes him a $1000 bet
on Pac-Man. He smiles, gets out his screwdriver and takes apart the Pac-Man
game. Everyone says "What are you doing?" The neuroscientist says "Well,
since we all know that Pac-Man is based on electric signals traveling
through these circuits, obviously I can understand it better than the other
guy by going straight to the source!"
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[Matplotlib-users] Grid problem?
When I try to turn on the grid for just one axis, seemingly in perfect
accordance with the documentation at
http://matplotlib.sourceforge.net/api/axes_api.html#matplotlib.axes.Axes.grid
it seems like there is a problem.
My commands are pasted below.
Am I doing this wrong? I am doing the best I can to follow the documentation
exactly.
Thanks for any help!
import matplotlib
matplotlib.use('MacOSX')
import matplotlib.pyplot as plt
fig=plt.figure()
ax=fig.add_subplot(111)
ax.plot([1,2,3])
ax.set_xlabel('Hi there')
ax.grid(True, axis='x')
bombayduck:~$ python
Python 2.6.5 (r265:79359, Mar 24 2010, 01:32:55)
[GCC 4.0.1 (Apple Inc. build 5493)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib
>>> matplotlib.use('MacOSX')
>>> import matplotlib.pyplot as plt
>>> fig=plt.figure()
>>> ax=fig.add_subplot(111)
>>> ax.plot([1,2,3])
[]
>>> ax.set_xlabel('Hi there')
>>> ax.grid(True, axis='x')
Traceback (most recent call last):
File "", line 1, in
File
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/axes.py",
line 1823, in grid
self.xaxis.grid(b, **kwargs)
File
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/axis.py",
line 965, in grid
if len(kwargs): artist.setp(tick.gridline,**kwargs)
File
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/artist.py",
line 1169, in setp
func = getattr(o,funcName)
AttributeError: 'Line2D' object has no attribute 'set_axis'
-dave--
A neuroscientist is at the video arcade, when someone makes him a $1000 bet
on Pac-Man. He smiles, gets out his screwdriver and takes apart the Pac-Man
game. Everyone says "What are you doing?" The neuroscientist says "Well,
since we all know that Pac-Man is based on electric signals traveling
through these circuits, obviously I can understand it better than the other
guy by going straight to the source!"
--
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[Matplotlib-users] Plot to display or file in the same script?
I'm trying to make a simple utility for doing a quick check of some data (electrophysiology recordings from our fMRI scanner lab). I want it to be foolproof as much as possible, so I was trying to figure out how to write a script that would try to plot to the display, then if that didn't work, to save it to a file instead (preferably as pdf, but I could live with png if that was the only option.) I've been searching the documentation and code examples for a while, and all I can find seems to suggest that the choice of display vs. file is predetermined at the very beginning by the choice of backend. I suppose that would mean I'd have to put the whole thing inside a try block, then if that didn't work, start over from scratch with a different backend and build the plot again. I was hoping to find a way to build the plot, then just try to "show" it or something like that, and if that failed, then save it instead. But so far I have not been able to figure out such a thing. So I would appreciate any help! Thanks very much! -- -dave "Pseudo-colored pictures of a person's brain lighting up are undoubtedly more persuasive than a pattern of squiggles produced by a polygraph. That could be a big problem if the goal is to get to the truth." -Dr. Steven Hyman, Harvard -- Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Plot to display or file in the same script?
The problem is that if no display is available, the error gets raised on the
point where I try to create a new figure, long before getting to show(), so I
can't do anything at all. Here's what it looks like when I log in without a
display available:
>>> import matplotlib.pyplot as plt
>>> plt.figure()
Traceback (most recent call last):
File "", line 1, in
File
"/usr/local/Python/Versions/2.6.5/lib/python2.6/site-packages/matplotlib/pyplot.py",
line 270, in figure
**kwargs)
File
"/usr/local/Python/Versions/2.6.5/lib/python2.6/site-packages/matplotlib/backends/backend_tkagg.py",
line 83, in new_figure_manager
window = Tk.Tk()
File "/usr/local/Python/Versions/2.6.5/lib/python2.6/lib-tk/Tkinter.py", line
1643, in __init__
self.tk = _tkinter.create(screenName, baseName, className, interactive,
wantobjects, useTk, sync, use)
_tkinter.TclError: no display name and no $DISPLAY environment variable
I can do this, which is widely recommended:
>>> import matplotlib
>>> matplotlib.use('Agg')
>>> import matplotlib.pyplot as plt
>>> fig=plt.figure()
>>> fig.save_fig('test.png')
But as far as I can tell from searching, once you do this, there is no way to
display to the screen. Unless there is a very clever trick that I don't know
about... which I am asking for here... :-)
On Jan 26, 2011, at 11:16 PM, Benjamin Root wrote:
> On Wednesday, January 26, 2011, David Perlman wrote:
>> I'm trying to make a simple utility for doing a quick check of some data
>> (electrophysiology recordings from our fMRI scanner lab). I want it to be
>> foolproof as much as possible, so I was trying to figure out how to write a
>> script that would try to plot to the display, then if that didn't work, to
>> save it to a file instead (preferably as pdf, but I could live with png if
>> that was the only option.)
>>
>> I've been searching the documentation and code examples for a while, and all
>> I can find seems to suggest that the choice of display vs. file is
>> predetermined at the very beginning by the choice of backend. I suppose
>> that would mean I'd have to put the whole thing inside a try block, then if
>> that didn't work, start over from scratch with a different backend and build
>> the plot again. I was hoping to find a way to build the plot, then just try
>> to "show" it or something like that, and if that failed, then save it
>> instead. But so far I have not been able to figure out such a thing. So I
>> would appreciate any help! Thanks very much!
>>
>>
>
> You can always put the show call in a try block and do a savefig if
> the show fails. I don't know where you get the idea that you have to
> do one or the other...
>
> Unless you are talking about the issue where the closing of a figure
> window would cause you to lose the figure data? In which case, you
> should be fine catching the show and doing the savefigg because the
> close event never occurred. However, you might get messy this way with
> a blank figure window...
>
> To be "foolproof" I would just always save first and then attempt to
> show. If the show was successful, you can delete the saved figure.
>
> Sorry for the rambling, but those are my thoughts on it.
>
> Ben Root
--
-dave
"Pseudo-colored pictures of a person's brain lighting up are
undoubtedly more persuasive than a pattern of squiggles produced by a
polygraph. That could be a big problem if the goal is to get to the
truth." -Dr. Steven Hyman, Harvard
--
Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)!
Finally, a world-class log management solution at an even better price-free!
Download using promo code Free_Logger_4_Dev2Dev. Offer expires
February 28th, so secure your free ArcSight Logger TODAY!
http://p.sf.net/sfu/arcsight-sfd2d
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