matplotlib-users Mailing List for matplotlib

On Nov 6, 2007 7:10 PM, Himanshu Grover <shu...@gm...> wrote:
> Hi,
>     I am new user of matplotlib, and am trying to attach different
> labels to different lines of a stem-plot. Can someone help me figure
> how to attach such labels and be able to see them in the plot ?

With the exception of legends, matplotlib doesn't have explicit
support for annotating a line, but it has good support for annotating
a point in your x,y dataspace.  So if you know the point you want
annotated, see the annotate command and examples

http://matplotlib.sourceforge.net/examples/annotation_demo.py

JDH

On Nov 7, 2007 7:17 AM, Michael Droettboom <md...@st...> wrote:

Michael> I'm not sure what you mean by "can't work on my canvas".  Can you
Michael> provide a small code sample that shows it not working?

Sunzen,

Here is a reference example in which the x and y constrained panning
do work in my tests with (GTKAgg and mpl svn), and picking is enabled,
so you might start and see if this works for you and if not what is
different about your code.  Note that you can only have *either*
panning and zooming enabled, or picking, but not both at the same
time, because both compete for the resource of the mouse via the
widget lock.

import numpy
from pylab import figure, show

X = numpy.random.rand(100, 1000)
xs = numpy.mean(X, axis=1)
ys = numpy.std(X, axis=1)

fig = figure()
ax = fig.add_subplot(111)
ax.set_title('click on point to plot time series')
line, = ax.plot(xs, ys, 'o', picker=5)  # 5 points tolerance


def onpick(event):

    if event.artist!=line: return True

    N = len(event.ind)
    if not N: return True


    figi = figure()
    for subplotnum, dataind in enumerate(event.ind):
        ax = figi.add_subplot(N,1,subplotnum+1)
        ax.plot(X[dataind])
        ax.text(0.05, 0.9, 'mu=%1.3f\nsigma=%1.3f'%(xs[dataind], ys[dataind]),
                transform=ax.transAxes, va='top')
        ax.set_ylim(-0.5, 1.5)
    figi.show()
    return True

fig.canvas.mpl_connect('pick_event', onpick)

show()

Sunzen> I'm sad to see that there is no answer to my question over these days.
Sunzen> Active development of matplotlib needs a lot of users.

Absolutely true.  We have several active developers, and many more
users, so developers tend to prioritize their responses to questions
which provide a clear description of the problem (with version and
environment information) and more importantly, a code sample so we can
see whether we can replicate the problem on our end.  When a user
doesn't take the time to prepare such a post so that we can help him
effectively, we tend to move on.

JDH

JDH

I'm not sure what you mean by "can't work on my canvas".  Can you 
provide a small code sample that shows it not working?

Cheers,
Mike

sunzen w. wrote:
> I'm sad to see that there is no answer to my question over these days.
> Active development of matplotlib needs a lot of users.
> 
> On Oct 31, 2007 11:17 AM, sunzen w. < su...@gm... 
> <mailto:su...@gm...>> wrote:
> 
>     The question is: how to enable panning/zooming operation to be
>     constrained to the x axis or y axis?
> 
>     The Tutorial says,
>     [about Pam Mode] If you press 'x' or 'y' while panning, the motion
>     will be contrained to the x or y axis, respectively
>     [about Zoom Mode] You can use the modifier keys 'x', 'y' or
>     'CONTROL' to constrain the zoom to the x axes, the y axes, or aspect
>     ratio preserve, respectively.
> 
>     I find it really works for some examples, such as stock_demo.py.
>     However, it currently can't work on my canvas.
>     Is there any special setting so as to enable the functionality?
> 
> 
>     Thanks for your guidance in advance.
> 
>     -- 
>     sunzen
>     <<freedom & enjoyment>>
> 
> 
> -- 
> sunzen
> <<freedom & enjoyment>>
> 
> 
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-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

Dear all,

I'm unable to import pylab anymore, and I don't know why. It seems to=20
be due to environment variables. The sys.path leads to the correct=20
directories. I'm running Fedora 7 (I started using Matplotlib & Co. on=20
FC5, then due to the problems I had I upgraded to F7, but it still=20
doesn't work) Do you know if there is a conflict between scipy,=20
matplotlib and pylab. Problems seem to have started after I installed=20
scipy from the home:ashigabou.repo repository.

I can import pylab from an interactive prompt:

[me@mycomputer ~] $ python
Python 2.5 (r25:51908, Oct 19 2007, 09:47:40)=20
[GCC 4.1.2 20070925 (Red Hat 4.1.2-27)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import pylab
>>> import matplotlib
>>> import scipy
>>>=20

If I try to run a script which imports pylab I get the following=20
error:

[me@mycomputer ~] $ python scripts/fit_gauss.py
Traceback (most recent call last):
  File "scripts/fit_gauss.py", line 3, in <module>
    from pylab import *
  File "/usr/lib/python2.5/site-packages/pylab.py", line 1, in=20
<module>
    from matplotlib.pylab import *
ImportError: No module named pylab

I am also getting the same error if I try to run a script from XEmacs.

Thank you for your time!

Cheers,

Maximilian


________________________________________________
Tiscali Tandem Free (Telefono+Adsl). Attiva entro l?8/11/07: chiami in tutt=
a Italia e navighi senza limiti a SOLI 9,95 =E2=82=AC AL MESE FINO A PRIMAV=
ERA 2008! http://abbonati.tiscali.it/adsl/prodotti/dem/tc/tandemfree_tel_cc=
/

I'm sad to see that there is no answer to my question over these days.
Active development of matplotlib needs a lot of users.

On Oct 31, 2007 11:17 AM, sunzen w. <su...@gm...> wrote:

> The question is: how to enable panning/zooming operation to be constrained
> to the x axis or y axis?
>
> The Tutorial says,
> [about Pam Mode] If you press 'x' or 'y' while panning, the motion will be
> contrained to the x or y axis, respectively
> [about Zoom Mode] You can use the modifier keys 'x', 'y' or 'CONTROL' to
> constrain the zoom to the x axes, the y axes, or aspect ratio preserve,
> respectively.
>
> I find it really works for some examples, such as stock_demo.py.
> However, it currently can't work on my canvas.
> Is there any special setting so as to enable the functionality?
>
>
> Thanks for your guidance in advance.
>
> --
> sunzen
> <<freedom & enjoyment>>
>
>
-- 
sunzen
<<freedom & enjoyment>>

Hi,
    I am new user of matplotlib, and am trying to attach different
labels to different lines of a stem-plot. Can someone help me figure
how to attach such labels and be able to see them in the plot ?

Thanks