matplotlib-users Mailing List for matplotlib

Neacsa Bogdan Valentin, on 2011-07-12 03:00,  wrote:
> I'm having a problem getting matplotlib to work with either
> easy_install or pip install. I've tries all sorts of options
> from easy_install matplotlib, pip install matplotlib,
> easy_install
> http://downloads.sourceforge.net/project/matplotlib/matplotlib/matplotlib-0.98.5/matplotlib-0.98.5.3.tar.gz
> The error which causes both to fail is:

Hi Bogdan,

are you specifically trying to install that old version of
matplotlib? If not, add the -U flag to easy_install to try to
grab a newer version
 
best,
-- 
Paul Ivanov
314 address only used for lists,  off-list direct email at:
http://pirsquared.org | GPG/PGP key id: 0x0F3E28F7 

Hi
I have a GTK application with the code

def on_pick(event):
    print "on_pick"
    thisline = event.artist
    xdata, ydata = thisline.get_data()
    ind = event.ind
    print 'on pick line:', zip(xdata[ind], ydata[ind])

cid = fig.canvas.mpl_connect('pick_event', on_pick)

but the routine never gets called when I click the left mouse button.
Instead,  the FigureCanvas "pick" method is called.
What am I doing wrong??

-Mathew

Thanks Christoph.  That fixed it at my end as well. 

Regards,
Noah.

-----Original Message-----
From: Christoph Gohlke [mailto:cg...@uc...] 
Sent: July-12-11 3:40 AM
To: mat...@li...
Subject: Re: [Matplotlib-users] Matplotlib crash on Windows 2008 Server



On 7/7/2011 3:06 PM, Noah Aklilu wrote:
> Hello,
>
> I am using matplotlib as part of a data analysis tool, and I am having 
> problems with a crash on Windows 2008 server when plotting data. The 
> application use to run fine, though I guess there was a round of 
> windows updates recently (including some VC++ 2008 runtime updates). 
> No problems on Windows 7 professional with the same runtime updates.
>
> I have tracked the problem down to the function call to 
> update_path_extents in the _path.pyd module from transforms.py (L821 
> in 1.0.1).
>
> Anyone else seeing this?


I can reproduce this. For me any matplotlib script crashes on Windows Server 2008 when frozen with py2exe and py2exe's "bundle_files" option is not 3 (the default). Frozen PIL scripts also crash. The executables work When bundle_files=3.

Christoph


>
> The event log shows that it is an uncaught VC++ exception based on 
> this
> message:
>
> Log Name: Application
>
> Source: Application Error
>
> Date: 07/07/2011 3:11:40 PM
>
> Event ID: 1000
>
> Task Category: (100)
>
> Level: Error
>
> Keywords: Classic
>
> User: N/A
>
> Computer: TS1.synodon.com
>
> Description:
>
> Faulting application name: sensview.exe, version: 0.0.0.0, time stamp:
> 0x4918019c
>
> Faulting module name: KERNELBASE.dll, version: 6.1.7601.17514, time
> stamp: 0x4ce7bafa
>
> Exception code: 0xe06d7363
>
> Fault offset: 0x0000b727
>
> Faulting process id: 0x18d8
>
> Faulting application start time: 0x01cc3cea60fe867f
>
> Faulting application path: C:\Program Files 
> (x86)\sensview\sensview.exe
>
> Faulting module path: C:\Windows\syswow64\KERNELBASE.dll
>
> Report Id: b4b6d9f6-a8dd-11e0-bdde-002590135f53
>
> Event Xml:
>
> <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
>
> <System>
>
> <Provider Name="Application Error" />
>
> <EventID Qualifiers="0">1000</EventID>
>
> <Level>2</Level>
>
> <Task>100</Task>
>
> <Keywords>0x80000000000000</Keywords>
>
> <TimeCreated SystemTime="2011-07-07T21:11:40.000000000Z" />
>
> <EventRecordID>10539</EventRecordID>
>
> <Channel>Application</Channel>
>
> <Computer>TS1.synodon.com</Computer>
>
> <Security />
>
> </System>
>
> <EventData>
>
> <Data>sensview.exe</Data>
>
> <Data>0.0.0.0</Data>
>
> <Data>4918019c</Data>
>
> <Data>KERNELBASE.dll</Data>
>
> <Data>6.1.7601.17514</Data>
>
> <Data>4ce7bafa</Data>
>
> <Data>e06d7363</Data>
>
> <Data>0000b727</Data>
>
> <Data>18d8</Data>
>
> <Data>01cc3cea60fe867f</Data>
>
> <Data>C:\Program Files (x86)\sensview\sensview.exe</Data>
>
> <Data>C:\Windows\syswow64\KERNELBASE.dll</Data>
>
> <Data>b4b6d9f6-a8dd-11e0-bdde-002590135f53</Data>
>
> </EventData>
>
> </Event>
>
>
>
> ----------------------------------------------------------------------
> -------- All of the data generated in your IT infrastructure is 
> seriously valuable.
> Why? It contains a definitive record of application performance, 
> security threats, fraudulent activity, and more. Splunk takes this 
> data and makes sense of it. IT sense. And common sense.
> http://p.sf.net/sfu/splunk-d2d-c2
>
>
>
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users

------------------------------------------------------------------------------
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Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-d2d-c2
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On Tue, Jul 12, 2011 at 12:53 AM, Kirill Lapshin (Macquarie Securities) <
Kir...@ma...> wrote:

> **
> Hello,
>
> We've encountered a problem plotting a nearly flat surface. Interestingly
> exactly flat surface can be plotted just fine, so it seems the bug is
> triggered when a range of values on z axis is very narrow. The problem can
> be easily reproduced on 32-bit windows and 64-bit linux, the only platforms
> I have handy, so most likely it is not platform specific. Both platforms
> have Python 2.6 and Matplotlb 1.0.1, and I've also seen the same error on
> Windows with Matplotlib 1.0.0. Here is a simplified repro:
>
> ------
> from matplotlib import pyplot
> from mpl_toolkits.mplot3d import axes3d
> import numpy
>
> n = 3
> m = 4
> x = range(n)
> y = range(m)
> z = [ 0.2999999999999 for i in range(n*m) ]
> z[1] = 0.3 # comment this line to make it pass
>
> figure = pyplot.figure( 0 )
> ax = axes3d.Axes3D( figure )
> x = numpy.array( [ [ t ] * m for t in x ] )
> y = numpy.array( [ y ] * n )
> z = numpy.array( z )
> z = z.reshape( [ n, m ] )
> wire = ax.plot_wireframe( x, y, z )
> figure.show()
> pyplot.draw()
> -----
>
> Here is a traceback:
>
> ----
> Traceback (most recent call last):
>   File "C:\plotbug.py", line 21, in <module>
>     pyplot.draw()
>   File "C:\Python26\lib\site-packages\matplotlib\pyplot.py", line 358, in
> draw
>     get_current_fig_manager().canvas.draw()
>   File
> "C:\Python26\lib\site-packages\matplotlib\backends\backend_tkagg.py", line
> 248, in draw
>     FigureCanvasAgg.draw(self)
>   File "C:\Python26\lib\site-packages\matplotlib\backends\backend_agg.py",
> line 394, in draw
>     self.figure.draw(self.renderer)
>   File "C:\Python26\lib\site-packages\matplotlib\artist.py", line 55, in
> draw_wrapper
>     draw(artist, renderer, *args, **kwargs)
>   File "C:\Python26\lib\site-packages\matplotlib\figure.py", line 798, in
> draw
>     func(*args)
>   File "C:\Python26\lib\site-packages\mpl_toolkits\mplot3d\axes3d.py", line
> 172, in draw
>     ax.draw(renderer)
>   File "C:\Python26\lib\site-packages\mpl_toolkits\mplot3d\axis3d.py", line
> 243, in draw
>     newval = get_flip_min_max(xyz1[0], newindex, mins, maxs)
> IndexError: list index out of range
> ----
>
> If you comment out "z[1] = 0.3" line, and therefore make surface perfectly
> flat, then it will plot just fine.
> Any help would be greatly appreciated.
>
> Kind regards,
>
> Kirill Lapshin
>

Kirill,

Thanks for the report.  I am able to confirm that the problem occurs with
v1.0.1, however, it appears that it is solved in the current development
trunk and will work properly in the upcoming v1.1.0 release.  I am not 100%
certain which change it was that fixes this, but it is likely due to my work
to make mplot3d functions accept empty inputs.  This change would have
likely allowed mplot3d to skip some operations under certain conditions.

Because of the significant work that has gone into mplot3d since the v1.0.0
release, I would recommend all mplot3d users to upgrade to v1.1 when it is
released.

I hope this helps!
Ben Root

Hello,

I'm having a problem getting matplotlib to work with either easy_install or pip install. I've tries all sorts of options from easy_install matplotlib, pip install matplotlib, easy_install http://downloads.sourceforge.net/project/matplotlib/matplotlib/matplotlib-0.98.5/matplotlib-0.98.5.3.tar.gz The error which causes both to fail is:

lipo: can't figure out the architecture type of: /var/folders/vO/vOCgTRh6FuWMIH2kWdCZgk+++TM/-Tmp-//ccaBo27K.out
error: Setup script exited with error: command 'gcc-4.0' failed with exit status 1

I can get matplotlib working if I download from sourceforge and install manually but I will need to distribute my project and since matplotlib will be a dependecy this is not an option. So how can I get matplotlib to install with either easy_install or pip ?

Regards,
Bogdan

On 7/7/2011 3:06 PM, Noah Aklilu wrote:
> Hello,
>
> I am using matplotlib as part of a data analysis tool, and I am having
> problems with a crash on Windows 2008 server when plotting data. The
> application use to run fine, though I guess there was a round of windows
> updates recently (including some VC++ 2008 runtime updates). No problems
> on Windows 7 professional with the same runtime updates.
>
> I have tracked the problem down to the function call to
> update_path_extents in the _path.pyd module from transforms.py (L821 in
> 1.0.1).
>
> Anyone else seeing this?


I can reproduce this. For me any matplotlib script crashes on Windows 
Server 2008 when frozen with py2exe and py2exe's "bundle_files" option 
is not 3 (the default). Frozen PIL scripts also crash. The executables 
work When bundle_files=3.

Christoph


>
> The event log shows that it is an uncaught VC++ exception based on this
> message:
>
> Log Name: Application
>
> Source: Application Error
>
> Date: 07/07/2011 3:11:40 PM
>
> Event ID: 1000
>
> Task Category: (100)
>
> Level: Error
>
> Keywords: Classic
>
> User: N/A
>
> Computer: TS1.synodon.com
>
> Description:
>
> Faulting application name: sensview.exe, version: 0.0.0.0, time stamp:
> 0x4918019c
>
> Faulting module name: KERNELBASE.dll, version: 6.1.7601.17514, time
> stamp: 0x4ce7bafa
>
> Exception code: 0xe06d7363
>
> Fault offset: 0x0000b727
>
> Faulting process id: 0x18d8
>
> Faulting application start time: 0x01cc3cea60fe867f
>
> Faulting application path: C:\Program Files (x86)\sensview\sensview.exe
>
> Faulting module path: C:\Windows\syswow64\KERNELBASE.dll
>
> Report Id: b4b6d9f6-a8dd-11e0-bdde-002590135f53
>
> Event Xml:
>
> <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
>
> <System>
>
> <Provider Name="Application Error" />
>
> <EventID Qualifiers="0">1000</EventID>
>
> <Level>2</Level>
>
> <Task>100</Task>
>
> <Keywords>0x80000000000000</Keywords>
>
> <TimeCreated SystemTime="2011-07-07T21:11:40.000000000Z" />
>
> <EventRecordID>10539</EventRecordID>
>
> <Channel>Application</Channel>
>
> <Computer>TS1.synodon.com</Computer>
>
> <Security />
>
> </System>
>
> <EventData>
>
> <Data>sensview.exe</Data>
>
> <Data>0.0.0.0</Data>
>
> <Data>4918019c</Data>
>
> <Data>KERNELBASE.dll</Data>
>
> <Data>6.1.7601.17514</Data>
>
> <Data>4ce7bafa</Data>
>
> <Data>e06d7363</Data>
>
> <Data>0000b727</Data>
>
> <Data>18d8</Data>
>
> <Data>01cc3cea60fe867f</Data>
>
> <Data>C:\Program Files (x86)\sensview\sensview.exe</Data>
>
> <Data>C:\Windows\syswow64\KERNELBASE.dll</Data>
>
> <Data>b4b6d9f6-a8dd-11e0-bdde-002590135f53</Data>
>
> </EventData>
>
> </Event>
>
>
>
> ------------------------------------------------------------------------------
> All of the data generated in your IT infrastructure is seriously valuable.
> Why? It contains a definitive record of application performance, security
> threats, fraudulent activity, and more. Splunk takes this data and makes
> sense of it. IT sense. And common sense.
> http://p.sf.net/sfu/splunk-d2d-c2
>
>
>
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users

Hi,

> I want to pick a good (dynamic, for zooming) way to format the y axis.
> There are two issues:
> Does (1) seem like the right approach?  And for 2, is there already a
> formatter that is appropriate for this or could be adapted to it?
did you try the AutoDateLocator (from matplotlib.dates)?

And if you did so, are there specific problems with this locator?

Maximilian

Hello,
 
We've encountered a problem plotting a nearly flat surface.
Interestingly exactly flat surface can be plotted just fine, so it seems
the bug is triggered when a range of values on z axis is very narrow.
The problem can be easily reproduced on 32-bit windows and 64-bit linux,
the only platforms I have handy, so most likely it is not platform
specific. Both platforms have Python 2.6 and Matplotlb 1.0.1, and I've
also seen the same error on Windows with Matplotlib 1.0.0. Here is a
simplified repro:
 
------
from matplotlib import pyplot
from mpl_toolkits.mplot3d import axes3d
import numpy
 
n = 3
m = 4
x = range(n)
y = range(m)
z = [ 0.2999999999999 for i in range(n*m) ]
z[1] = 0.3 # comment this line to make it pass
 
figure = pyplot.figure( 0 )
ax = axes3d.Axes3D( figure )
x = numpy.array( [ [ t ] * m for t in x ] )
y = numpy.array( [ y ] * n )
z = numpy.array( z )
z = z.reshape( [ n, m ] )
wire = ax.plot_wireframe( x, y, z )
figure.show()
pyplot.draw()
-----
 
Here is a traceback:
 
----
Traceback (most recent call last):
  File "C:\plotbug.py", line 21, in <module>
    pyplot.draw()
  File "C:\Python26\lib\site-packages\matplotlib\pyplot.py", line 358,
in draw
    get_current_fig_manager().canvas.draw()
  File
"C:\Python26\lib\site-packages\matplotlib\backends\backend_tkagg.py",
line 248, in draw
    FigureCanvasAgg.draw(self)
  File
"C:\Python26\lib\site-packages\matplotlib\backends\backend_agg.py", line
394, in draw
    self.figure.draw(self.renderer)
  File "C:\Python26\lib\site-packages\matplotlib\artist.py", line 55, in
draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "C:\Python26\lib\site-packages\matplotlib\figure.py", line 798,
in draw
    func(*args)
  File "C:\Python26\lib\site-packages\mpl_toolkits\mplot3d\axes3d.py",
line 172, in draw
    ax.draw(renderer)
  File "C:\Python26\lib\site-packages\mpl_toolkits\mplot3d\axis3d.py",
line 243, in draw
    newval = get_flip_min_max(xyz1[0], newindex, mins, maxs)
IndexError: list index out of range
----
 
If you comment out "z[1] = 0.3" line, and therefore make surface
perfectly flat, then it will plot just fine.
Any help would be greatly appreciated.
 
Kind regards,
 
Kirill Lapshin
 

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I need to make a dates (on x) vs. durations of time (on y) plots and
need to have smart formatting for the y axis. My y data is in the
database in the format: '0:00:02.994000', (that is, 2.9 seconds) and
I'd like the y axis to be expressed in ticks of, e.g., "2 hrs", or "10
minutes", or "25 seconds", whichever is applicable...see below.

The data could range from as little as a few seconds to more than 12
hours.  Sometimes there will be outliers that are in a different unit.
E.g., there may be a plot in which most durations are 1-3 hrs, but now
and then there is a datapoint of 5 minutes, or even 30 seconds. Or it
could be another one with mostly datapoints in minutes, but an
occasional long or short one in hours or seconds.

I want to pick a good (dynamic, for zooming) way to format the y axis.
There are two issues:

1) Should I analyze the data to see what units the majority of
datapoints are in and then use that as the y axis units before
zooming? That is, if most are durations of minutes, then the y axis
should be given in minutes. If most are in hours, the y axis should be
hours, etc... This way the formatting is appropriate for the majority
of the data displayed.

2) If a plot's y units are given in terms of minutes (because of point
#1), but a user wants to zoom in on a datapoint that is only a few
seconds, I'd like the formatter to change the y scaling to be in terms
of seconds. I don't want to have express durations on the y axis as
anything like "0.0335" minutes, but rather "2 seconds".

Does (1) seem like the right approach?  And for 2, is there already a
formatter that is appropriate for this or could be adapted to it?

Suggestions welcome.  Thanks,
Che

The pre-defined hsv colour map has this property - can you use that?
Otherwise, yes, it is possible to define any map you like.

Gary R

On Fri, Jul 8, 2011 at 12:55 PM, Ben Elliston <bj...@ai...> wrote:
> Hi.
>
> I have a set of data with a range of (say) 0 to 100.  Is it possible
> to get matplotlib to use the same colour for 0 and 100, so that the
> colours "meet" at the ends of the color bar?
>
> One workaround is to just manipulate the data (eg. using abs (x-50)),
> but I would rather not, if possible.
>
> Thanks, Ben