Agent Problem

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Re: Agent Problem

On Mon, Sep 1, 2008 at 4:37 AM, Lotfi Benz <lbenz52@...> wrote:
> I am using matplotlib since three months, every thing was fine untill today
> I have got this error message which is strange and I could not figure out
> what it means.
> here I paste the error message I got.
> """
> Another agent is running...
> Failed to allocate the agent. Exitting...
> Failed to invoking the agent: No such file or directory
> Cannot launch the agent
> The messenger is now down

This looks like a KDE/Qt problem, not a matplotlib problem, eg
googling for the phrase,

   Failed to invoking the agent: No such file or directory

turns up hits like this:

   https://bugs.launchpad.net/ubuntu/+source/scim-bridge/+bug/203334

JDH

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axis and zoom

Hi Guys,

I have some questions:

1. How can I zoom in the horizontal axis and maintain the vertical axis 
unchanged with the zoom tool provided by matplotlib?

2. How can I change the xticks so that they do not overlap each other? 
For instance, I have a plot in time, but since it's a huge simulation 
the time ticks 2000 3000 are overlapping, so that I cannot understand. 
Is it possible to change the units? Like 2 3 and then add 10^3 somewhere 
else? I hope you can understand my question...sorry if it's not clear.

Bernardo M. Rocha

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Re: axis and zoom

On Tue, Sep 2, 2008 at 5:04 AM, bernardo martins rocha
<bernardo.rocha@...> wrote:
> Hi Guys,
>
> I have some questions:
>
> 1. How can I zoom in the horizontal axis and maintain the vertical axis
> unchanged with the zoom tool provided by matplotlib?

Hold down the 'x' key while zooming to constrain the zoom to the
x-axis -- ditto for 'y'.  This is covered at
http://matplotlib.sourceforge.net/doc/html/users/navigation_toolbar.html

> 2. How can I change the xticks so that they do not overlap each other?
> For instance, I have a plot in time, but since it's a huge simulation
> the time ticks 2000 3000 are overlapping, so that I cannot understand.
> Is it possible to change the units? Like 2 3 and then add 10^3 somewhere
> else? I hope you can understand my question...sorry if it's not clear.

You can set fewer ticks either by using your own date locator instance
(see the user's guide' chapter on tick locating and formatting) or by
setting the tick locations explicitly (eg, ax.set_xticks).

Another thing that can help is to rotate the tick labels -- with date
plots there is a helper function

  fig.autofmt_xdate()

which does this automatically.  The basic code is

for label in ax.get_xticklabels():
    label.set_horizontalalignment('right')
    label.set_rotation(30)

JDH

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Compound paths

Are there any more examples of matplotlib's new path functionality, in 
addition to the one in examples/api/path_patch_demo.py? Specifically, I 
would like an example of using compound paths to draw a donut-shape that 
shows the inner and outer edge and fills the donut with a color.

Thank you,
Paul

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pickup pixels values

Hi,

What is the best way to get the pixels values in addition to the pixel 
numbers when moving the mouse on on imhow display?
It could be either on the fly (would be great) or on click.

"best way" here means that the code can be quite complex but that it 
should be as simple as imshow from the end user point of view.

I'm using TkAgg.

Xavier

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Buggy 2D plot with ylim and large y values

Hi,

I've encountered what appears to be a bug in matplotlib-0.98.3
(Windows XP, Python 2.5). The following plot of a function with poles
displays garbage (large filled boxes instead of a curve). There's
large variation in the y values, but not so large that this shouldn't
be possible to plot correctly.

Is this problem known? Is there a workaround?

from pylab import *
x = [-2.97, -2.94, -2.91, -2.88, -2.85, -2.82, -2.79, -2.76, -2.73, -2.7,
-2.67, -2.64, -2.61, -2.58, -2.55, -2.52, -2.49, -2.46, -2.43, -2.4, -2.37,
-2.34, -2.31, -2.28, -2.25, -2.22, -2.19, -2.16, -2.13, -2.1, -2.07, -2.04,
-2.01, -1.98, -1.95, -1.92, -1.89, -1.86, -1.83, -1.8, -1.77, -1.74, -1.71,
-1.68, -1.65, -1.62, -1.59, -1.56, -1.53, -1.5, -1.47, -1.44, -1.41, -1.38,
-1.35, -1.32, -1.29,-1.26, -1.23, -1.2, -1.17, -1.14, -1.11, -1.08, -1.05,
-1.02, -0.99, -0.96, -0.93, -0.9, -0.87, -0.84, -0.81, -0.78, -0.75, -0.72,
-0.69, -0.66, -0.63, -0.6, -0.57, -0.54, -0.51, -0.48, -0.45, -0.42, -0.39,
-0.36, -0.33, -0.3, -0.27, -0.24, -0.21, -0.18, -0.15, -0.12, -0.09, -0.06,
-0.03]
y = [7.40742e+6, 462976.0, 91463.4, 28950.0, 11867.8, 5732.96, 3104.37,
1830.03, 1153.53, 768.963, 538.805, 395.968, 305.58, 248.666, 214.668,
197.843, 195.517, 207.33, 235.138, 283.525, 361.162, 483.641, 679.315,
1001.79, 1558.46, 2581.22, 4621.92, 9171.58, 21022.7, 60014.1, 249909.0,
2.34376e+6, 6.0e+8, 3.75e+7, 960013.0, 146498.0, 40995.2, 15633.9,7200.57,
3768.46, 2164.71, 1336.34, 875.104, 603.287, 436.34, 331.148, 264.559,
223.743, 201.613, 194.594, 201.594, 223.706, 264.503, 331.072, 436.244,
603.172, 874.968, 1336.19, 2164.53, 3768.26, 7200.35, 15633.7, 40994.9,
146498.0, 960013.0, 3.75e+7, 6.0e+8, 2.34376e+6, 249909.0, 60013.7,
21022.2, 9171.01, 4621.3, 2580.56, 1557.75, 1001.03, 678.491, 482.753,
360.205, 282.492, 234.022, 206.125, 194.213, 196.431, 213.137, 247.004,
303.774, 394.002, 536.66, 766.62, 1150.97, 1827.22, 3101.28, 5729.56,
11864.0, 28945.8, 91458.8, 462971.0, 7.40741e+6]
plot(x, y)
ylim([-40, 40])
show()

--
Fredrik

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Re: Buggy 2D plot with ylim and large y values

On Sep 2, 2008, at 6:56 PM, Fredrik Johansson wrote:

> Hi,
>
> I've encountered what appears to be a bug in matplotlib-0.98.3
> (Windows XP, Python 2.5). The following plot of a function with poles
> displays garbage (large filled boxes instead of a curve). There's
> large variation in the y values, but not so large that this shouldn't
> be possible to plot correctly.
>
> Is this problem known? Is there a workaround?
>
> from pylab import *
> x = [-2.97, -2.94, -2.91, -2.88, -2.85, -2.82, -2.79, -2.76, -2.73,  
> -2.7,
> -2.67, -2.64, -2.61, -2.58, -2.55, -2.52, -2.49, -2.46, -2.43, -2.4,  
> -2.37,
> -2.34, -2.31, -2.28, -2.25, -2.22, -2.19, -2.16, -2.13, -2.1, -2.07,  
> -2.04,
> -2.01, -1.98, -1.95, -1.92, -1.89, -1.86, -1.83, -1.8, -1.77, -1.74,  
> -1.71,
> -1.68, -1.65, -1.62, -1.59, -1.56, -1.53, -1.5, -1.47, -1.44, -1.41,  
> -1.38,
> -1.35, -1.32, -1.29,-1.26, -1.23, -1.2, -1.17, -1.14, -1.11, -1.08,  
> -1.05,
> -1.02, -0.99, -0.96, -0.93, -0.9, -0.87, -0.84, -0.81, -0.78, -0.75,  
> -0.72,
> -0.69, -0.66, -0.63, -0.6, -0.57, -0.54, -0.51, -0.48, -0.45, -0.42,  
> -0.39,
> -0.36, -0.33, -0.3, -0.27, -0.24, -0.21, -0.18, -0.15, -0.12, -0.09,  
> -0.06,
> -0.03]
> y = [7.40742e+6, 462976.0, 91463.4, 28950.0, 11867.8, 5732.96,  
> 3104.37,
> 1830.03, 1153.53, 768.963, 538.805, 395.968, 305.58, 248.666, 214.668,
> 197.843, 195.517, 207.33, 235.138, 283.525, 361.162, 483.641, 679.315,
> 1001.79, 1558.46, 2581.22, 4621.92, 9171.58, 21022.7, 60014.1,  
> 249909.0,
> 2.34376e+6, 6.0e+8, 3.75e+7, 960013.0, 146498.0, 40995.2,  
> 15633.9,7200.57,
> 3768.46, 2164.71, 1336.34, 875.104, 603.287, 436.34, 331.148, 264.559,
> 223.743, 201.613, 194.594, 201.594, 223.706, 264.503, 331.072,  
> 436.244,
> 603.172, 874.968, 1336.19, 2164.53, 3768.26, 7200.35, 15633.7,  
> 40994.9,
> 146498.0, 960013.0, 3.75e+7, 6.0e+8, 2.34376e+6, 249909.0, 60013.7,
> 21022.2, 9171.01, 4621.3, 2580.56, 1557.75, 1001.03, 678.491, 482.753,
> 360.205, 282.492, 234.022, 206.125, 194.213, 196.431, 213.137,  
> 247.004,
> 303.774, 394.002, 536.66, 766.62, 1150.97, 1827.22, 3101.28, 5729.56,
> 11864.0, 28945.8, 91458.8, 462971.0, 7.40741e+6]
> plot(x, y)
> ylim([-40, 40])
> show()

I may be missing something here, but everything plots fine *if you  
remove the call to ylim*. Note that the minimum y value is 194.213. I  
wouldn't expect to see anything if none of the data is between y =  
-40 .. 40. Sorry if I'm overlooking something.

Best,
-Tony

> --
> Fredrik
>
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Figure Dimension

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plot star instead of pentagram

hi all,
matplotlib says it's similar to MATLAB's plot tool, however, using 
plot(..., 'p') plots pentagram instead of star. It makes my (Python 
scikits.openopt) graphic output of numerical convergence look uglier 
than MATLAB version.

So is plotting a star intended to be ever implemented?
Thank you in advance, Dmitrey

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