matplotlib-users Mailing List for matplotlib

On Thu, Dec 2, 2010 at 11:22 AM, Burak TUYSUZ <bur...@gm...> wrote:

> Hi all,
> I am plotting a 3d surface but at the axis scientific notation works
> but I can not see the exponential part at the end of the axis.
> I mean it does simplifies
>       9.9*e^5 15*e^5 ...
> to
>       9.9   15
> but there is no e^5 at the end of the axis that you need to multiply each
> value
> I am tired of manually adding that to the plots. How can I automatically
> add the divider to the top of each axis.
> Thank you in advance
> -Burak
>
> Here is the code
>
>
>       formatter = ScalarFormatter(useMathText=True, useOffset=True)
>       formatter.set_scientific(True)
>
>       fig = plt.figure(figsize=(21,9.5))
>       ax = fig.add_subplot(1,2,1, projection='3d', azim=180)
>       ax.set_xlabel('Doppler')
>       ax.set_ylabel('Delay')
>       ax.set_zlabel('')
>
>       ax.w_xaxis.set_major_formatter(formatter)
>       ax.w_yaxis.set_major_formatter(formatter)
>
>
Burak,

I can confirm your bug.  I have traced it down and it appears that printing
the offset text (the 'e^5') is not even implemented.  I will look into
seeing how to implement this in mplot3d.

Ben Root

Hello.  I've decided to upgrade to matplotlib 1.0, but I'll need to fix a
few problems that have come up.  I was hoping I could get some help on this
here.

First thing is, I have a bit of point picker code that was written by JJ on
this list some time back that has been working well.  This is the start of
it:

def contains_points(self, line, mouseevent):
        line.pickradius = 5

        # Make sure we have data to plot
        if line._invalid:
            line.recache()
        if len(line._xy)==0: return False,{}

But I am getting an error:

AttributeError: 'Line2D' object has no attribute '_invalid'

Can someone please tell me what the right method is now?  And how I can
learn about these sorts of changes on my own?

Thank you,
Che

> From: G. Durin [mailto:g....@in...] 
> Sent: Tuesday, November 23, 2010 08:34

<snip>

> # Update the error bars
> barlinecols[0].set_segments(zip(zip(x-xerr,y), zip(x+xerr,y)))
> barlinecols[1].set_segments(zip(zip(x,y-yerr), zip(x,y+yerr)))
> 
> The last lines are a little clumsy, but I could not find a 
> better way. 

I'm glad you were able to solve your problem.  An alternative to the above
lines is

    barlinecols[0].set_segments( 
            np.array([[x - xerr, y], 
                      [x + xerr, y]]).transpose((2, 0, 1)) )

and likewise for y.  The transposition produces a depth stack of 2-by-2
arrays.

On Wed, Dec 1, 2010 at 11:58 AM, Justin McCann <jn...@gm...> wrote:
> Is there a straightforward way to limit the legend only to lines that
> appear within the current display limits? I have a plot that has too
> many separate data series to show on the legend at once, but once I
> zoom in it would be good to re-set the legend to show only the visible
> data points/lines.
>
> I guess the way to do that is:
>
> - catch the DrawEvent
> - call get_xlim() and get_ylim() to get the new bounds
> - figure out which lines are within the bounds and add them to a new
> legend. I could run through each line and compare xlim/ylim with
> line.get_xydata(); is there already a function to do this?

This seems to do the trick, but might be a bit too clever. I'm not
sure if get_children() (or findobjs) is the right call to retrieve all
the plot elements.


def add_legend_viewlim(ax, fontsize='xx-small', **kwargs):
    """Reset the legend in ax to only display lines that are currenlty
visible"""
    label_objs = []
    label_texts = []
    font = matplotlib.font_manager.FontProperties(size=fontsize);
    for obj in ax.get_children():
        if not hasattr(obj, 'get_xydata'): continue
        if ax.viewLim.overlaps(matplotlib.transforms.Bbox(obj.get_xydata())):
            label = obj.get_label()
            if (label is not None) and (label != ''):
                label_objs.append(obj)
                label_texts.append(label)
    leg = ax.legend(label_objs, label_texts, prop=font, **kwargs)
    return leg

On Fri, Dec 3, 2010 at 9:06 AM, Matt <mx...@ma...> wrote:

> Thanks so much, Ben, that did work.
>
> Matt
>
> On Fri, Dec 3, 2010 at 2:57 PM, Benjamin Root <ben...@ou...> wrote:
> > On Fri, Dec 3, 2010 at 8:49 AM, Matt <mx...@ma...> wrote:
> >>
> >> LINUX
> >>
> >> Linux ubuntu 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC
> >> 2010 i686 GNU/Linux
> >>
> >>
> >>
> >> GCC
> >>
> >> gcc (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5
> >> Copyright (C) 2010 Free Software Foundation, Inc.
> >>
> >>
> >>
> >>
> >>
> >> MATPLOTLIB
> >>
> >> ubuntu@ubuntu:~/Desktop/mp$ python -c `import matplotlib; print
> >> matplotlib.__version__`
> >> The program 'import' can be found in the following packages:
> >>  * imagemagick
> >>  * graphicsmagick-imagemagick-compat (You will have to enable
> >> component called 'universe')
> >> Try: sudo apt-get install <selected package>
> >> Warning: unknown mime-type for "matplotlib.__version__" -- using
> >> "application/octet-stream"
> >> Error: no such file "matplotlib.__version__"
> >> Argument expected for the -c option
> >> usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
> >> Try `python -h' for more information.
> >>
> >>
> >>
> >> OUTPUT
> >>
> >> ubuntu@ubuntu:~/Desktop/mp$ sudo apt-get install python-matplotlib
> >> Reading package lists... Done
> >> Building dependency tree
> >> Reading state information... Done
> >> Package python-matplotlib is not available, but is referred to by
> >> another package.
> >> This may mean that the package is missing, has been obsoleted, or
> >> is only available from another source
> >>
> >> E: Package 'python-matplotlib' has no installation candidate
> >>
> >
> > Matt, in your first command, you used a backtick, which is different from
> a
> > single quote.  A phrase quoted by a backtick will execute as a shell
> command
> > and put its output in place for the rest of the shell command.
> >
> > Then, the reason you probably can't find matplotlib is that you probably
> > don't have the other repos turned on.  I forget which repo matplotlib is
> in,
> > but it might be the "universe" repo.  If you open the synaptic package
> > manager and view the available repositories (it is in the menu items, I
> > forget which), you can turn on other Ubuntu repos.
> >
> > Let us know how that works for you.
> >
> > Ben Root
> >
> >
>

Good, glad to be of help.

Ben Root

On Fri, Dec 3, 2010 at 8:49 AM, Matt <mx...@ma...> wrote:

> LINUX
>
> Linux ubuntu 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC
> 2010 i686 GNU/Linux
>
>
>
> GCC
>
> gcc (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5
> Copyright (C) 2010 Free Software Foundation, Inc.
>
>
>
>
>
> MATPLOTLIB
>
> ubuntu@ubuntu:~/Desktop/mp$ python -c `import matplotlib; print
> matplotlib.__version__`
> The program 'import' can be found in the following packages:
>  * imagemagick
>  * graphicsmagick-imagemagick-compat (You will have to enable
> component called 'universe')
> Try: sudo apt-get install <selected package>
> Warning: unknown mime-type for "matplotlib.__version__" -- using
> "application/octet-stream"
> Error: no such file "matplotlib.__version__"
> Argument expected for the -c option
> usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
> Try `python -h' for more information.
>
>
>
> OUTPUT
>
> ubuntu@ubuntu:~/Desktop/mp$ sudo apt-get install python-matplotlib
> Reading package lists... Done
> Building dependency tree
> Reading state information... Done
> Package python-matplotlib is not available, but is referred to by
> another package.
> This may mean that the package is missing, has been obsoleted, or
> is only available from another source
>
> E: Package 'python-matplotlib' has no installation candidate
>
>
Matt, in your first command, you used a backtick, which is different from a
single quote.  A phrase quoted by a backtick will execute as a shell command
and put its output in place for the rest of the shell command.

Then, the reason you probably can't find matplotlib is that you probably
don't have the other repos turned on.  I forget which repo matplotlib is in,
but it might be the "universe" repo.  If you open the synaptic package
manager and view the available repositories (it is in the menu items, I
forget which), you can turn on other Ubuntu repos.

Let us know how that works for you.

Ben Root

LINUX

Linux ubuntu 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC
2010 i686 GNU/Linux



GCC

gcc (Ubuntu/Linaro 4.4.4-14ubuntu5) 4.4.5
Copyright (C) 2010 Free Software Foundation, Inc.





MATPLOTLIB

ubuntu@ubuntu:~/Desktop/mp$ python -c `import matplotlib; print
matplotlib.__version__`
The program 'import' can be found in the following packages:
 * imagemagick
 * graphicsmagick-imagemagick-compat (You will have to enable
component called 'universe')
Try: sudo apt-get install <selected package>
Warning: unknown mime-type for "matplotlib.__version__" -- using
"application/octet-stream"
Error: no such file "matplotlib.__version__"
Argument expected for the -c option
usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
Try `python -h' for more information.



OUTPUT

ubuntu@ubuntu:~/Desktop/mp$ sudo apt-get install python-matplotlib
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package python-matplotlib is not available, but is referred to by
another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'python-matplotlib' has no installation candidate

Hi all,


I wanted to plot complex valued functions with real support:
 
  f : R -> C

The plot should show the absulote value abs(f)^2 and the phase angle(f).
The demand for such a plot type originates from quantum mechanics
where I want to plot |phi> and/or <phi|phi> in this way showing
the phase of the wave function.

For this task I wrote a little script and it works quite well.
But I have a question regarding the color coding of the phase.

Is there a better way to provide the rgb_colors to the line collection?

Any hints to make the script more efficient would help.
I need to run it on hundreds of frames to produce animations.


BTW: You can add this to your gallery page if you want.
Maybe it's helpful to other people. 


-- Raoul

Hi all,


I wanted to plot complex valued functions with real support:
 
  f : R -> C

The plot should show the absulote value abs(f)^2 and the phase angle(f).
The demand for such a plot type originates from quantum mechanics
where I want to plot |phi> and/or <phi|phi> in this way showing
the phase of the wave function.

For this task I wrote a little script and it works quite well.
But I have a question regarding the color coding of the phase.

Is there a better way to provide the rgb_colors to the line collection?

Any hints to make the script more efficient would help.
I need to run it on hundreds of frames to produce animations.


BTW: You can add this to your gallery page if you want.
Maybe it's helpful to other people. 


-- Raoul

Hi all,


I wanted to plot complex valued functions with real support:
 
  f : R -> C

The plot should show the absulote value abs(f)^2 and the phase angle(f).
The demand for such a plot type originates from quantum mechanics
where I want to plot |phi> and/or <phi|phi> in this way showing
the phase of the wave function.

For this task I wrote a little script and it works quite well.
But I have a question regarding the color coding of the phase.

Is there a better way to provide the rgb_colors to the line collection?

Any hints to make the script more efficient would help.
I need to run it on hundreds of frames to produce animations.


BTW: You can add this to your gallery page if you want.
Maybe it's helpful to other people. 


-- Raoul

Hi all,


I wanted to plot complex valued functions with real support:
 
  f : R -> C

The plot should show the absulote value abs(f)^2 and the phase angle(f).
The demand for such a plot type originates from quantum mechanics
where I want to plot |phi> and/or <phi|phi> in this way showing
the phase of the wave function.

For this task I wrote a little script and it works quite well.
But I have a question regarding the color coding of the phase.

Is there a better way to provide the rgb_colors to the line collection?

Any hints to make the script more efficient would help.
I need to run it on hundreds of frames to produce animations.


BTW: You can add this to your gallery page if you want.
Maybe it's helpful to other people. 


-- Raoul