matplotlib-users

[Matplotlib-users] applying format to numbering

[Meesters, C. <mee...@un...>]

Hi,=20

It's me again ... I still do not find my way out of the problem on how I =
can apply a format to the numbering of an axis. I am using the WXAgg =
backend and this is my code:

font =3D FontProperties()
self.font =3D font.copy()
self.font.set_size('x-small')
self.font.set_family('serif')
self.font.set_style('normal')
self.font.set_variant('normal')
self.font.set_weight('light')

<snip>and then a function plot_data:

def plot_data(self):
<snip>
			a =3D self.fig.add_subplot(111)
			a.grid(self.g)
	=09
		for x,y in zip(self.active_datasets,linestyles):
			if len(self.datasets)=3D=3D1: a.set_title('Spatial Distribution of =
%s' % x.attributes['name'], fontproperties=3Dself.font, =
horizontalalignment=3D'right')
			if self.log_intensity:
				a.semilogy(x.ichannel,x.intensity,'k',y)
				a.set_xlim([0,len(x.ichannel)])
				a.set_ylabel(r'$log_{10} \rm{(Intensity [counts])}$', =
fontproperties=3Dself.font) 				a.set_xlabel(r'$\rm{channels}$', =
fontproperties=3Dself.font)
<snip>

Now, how can I apply the font to the subplot? In order to illustrate the =
problem a little bit better, I attached a part of a screen shot.
Here, with just one single subplot there is actually no problem and the =
plot would look absolutely stunning witht the default font. But with =
more than one subplot in the panel there is just not enough space to =
display all labels and the numbering on my screen.

I guess the solution is not half as complicated than the things I've =
tried. But since it is not really obvious to me, I am willing to =
contribute an example to this topic if there is not already one. Are =
there guidelines on how to file examples?

Regards,
Christian

Re: [Matplotlib-users] applying format to numbering

[Ken M. <mc...@ii...>]

Meesters, Christian wrote:
> It's me again ... I still do not find my way out of the problem on how I can
 > apply a format to the numbering of an axis. I am using the WXAgg backend and
 > this is my code:

It sounds like you tring to change the formatting of the tick labels of the 
axes.  I believe that the RC parameter `tick.labelsize' will do the trick if 
this is all you need.  There are doubtless a slew of other tick-related options.

If you're trying to do something more complicated, like setup complicated font 
properties for the labels, the following approach might work.

def fontify_ticks(axes, fp):
	xticks = axes.xaxis.get_major_ticks() + axes.xaxis.get_minor_ticks()
	yticks = axes.yaxis.get_major_ticks() + axes.yaxis.get_minor_ticks()
	for t in xticks + yticks:
		t.label1.set_fontproperties(fp) # outer/upper tick label
		t.label2.set_fontproperties(fp) # inner/lower tick label

I hope this helps.

Ken

Re: [Matplotlib-users] applying format to numbering

[John H. <jdh...@ac...>]

>>>>> "Meesters," == Meesters, Christian <mee...@un...> writes:

    Meesters> Hi, It's me again ... I still do not find my way out of
    Meesters> the problem on how I can apply a format to the
    Meesters> numbering of an axis. I am using the WXAgg backend and
    Meesters> this is my code:


To apply a "default font" for the entire figure, you can use the rc
params -- see http://matplotlib.sf.net/.matplotlibrc, especially the
font.*, axes.* and tick.* settings

    from matplotlib import rc
    from pylab import figure, show

    rc('font', weight='bold', style='italics')
    rc('axes', labelsize=25)
    rc('tick', labelsize=14)

    fig = figure()
    ax = fig.add_subplot(111)
    ax.plot(range(10))
    ax.set_xlabel('hi')
    ax.set_ylabel('bye')
    ax.set_title('easy as 1-2-3')

    show()

You can also customize the default tick labels sizes individually.  I
already noted that for the xlabel, ylabel and title you can use
kwargs, eg

    ax.set_xlabel('hi', fontsize='smaller')

and so on.

For the tick labels, you will need to get a list of the tick label
Text instances you want to customize

  labels = ax.get_xticklabels()

You can call any of the text setter methods on these labels, which are
detailed here
http://matplotlib.sourceforge.net/matplotlib.text.html#Text

For example, you can set the fontsize or fontproperty with

for label in labels:
    label.set_fontsize(mysize)

for label in labels:
    label.set_fontproperties(fp)

A lot of the methods like set_fontsize are historical artifacts from
before we had font properties, and they just forward the call to the
property

If you want finer grained control over the major and minor ticks, or
different customizations for the top and bottom ticks (on the xaxis
the top ticks are normally off but you can turn them on) you can do
that too, but it is a little more work

  # ditto for get_minor_ticks
  ticks = ax.xaxis.get_major_ticks()
  majLabelsLower = [tick.label1 for tick in ticks]
  majLabelsUpper = [tick.label2 for tick in ticks]

and then call the setter methods on these as above.

Hope this helps,
JDH

Re: [Matplotlib-users] applying format to numbering

[Christian M. <mee...@un...>]

Hi,

Thanks John and Ken for your detailed replies. They came almost 
immediately, but since I'm 6-7 hours ahead of you and the weekend was 
approaching this answer took a bit longer ...

Anyway, now everything is working - finally I've got it. In contrast to 
your advise, John, I rather don't change the rc-file, for this not such 
a good idea if one wants to distribute the software at some point among 
colleagues.

May I still add a different question? As you know I'm using the WXAgg 
backend (at least in some of my scripts) and embedded essentially 
everything like in the example scripts:

class SAXS_wx(wx.Frame):
	def __init__(self,parent,id,title):
		wx.Frame.__init__(self,None,-1,"SPlot")
<snip>
		self.fig = Figure(figsize=(5,4),dpi=100)
		self.axes = self.fig.add_subplot(111)
		self.canvas = FigureCanvas(self, -1, self.fig)
		self.parent = self.canvas.GetParent()
		self.canvas.mpl_connect('motion_notify_event',self.mouse_move)
		sizer = wx.BoxSizer(wx.VERTICAL)
		self.sizer = sizer
		sizer.Add(self.canvas, 1, wx.LEFT|wx.TOP|wx.GROW|wx.EXPAND)
		
		self.add_splot_toolbar()
		
		self.SetSizer(self.sizer)
		self.Fit()

Now, changing the figsize parameter has absolutely no effect on the 
canvas size whatsoever. Does anybody know how to change the figure 
size? Currently I only get a beautifully, tiny window every user needs 
to expand by hand ...

Once more for the record: I'm stuck with matplotlib 0.71 on Panther (OS 
X 10.3) with Apple's framework Python 2.3 for a while.

Thanks,
Christian

Re: [Matplotlib-users] applying format to numbering

[Ken M. <mc...@ii...>]

On May 28, 2005, at 6:24 AM, Christian Meesters wrote:
> Now, changing the figsize parameter has absolutely no effect on the 
> canvas size whatsoever. Does anybody know how to change the figure 
> size? Currently I only get a beautifully, tiny window every user needs 
> to expand by hand ...

I have been unable to reproduce this behavior using matplotlib 0.72 
under OS X 10.3.9 with wxPython 2.6.0.0.  What version of wxPython are 
you running?

Ken

Re: [Matplotlib-users] applying format to numbering

[Christian M. <mee...@un...>]

On 28 May 2005, at 17:20, Ken McIvor wrote:

> On May 28, 2005, at 6:24 AM, Christian Meesters wrote:
>> Now, changing the figsize parameter has absolutely no effect on the 
>> canvas size whatsoever. Does anybody know how to change the figure 
>> size? Currently I only get a beautifully, tiny window every user 
>> needs to expand by hand ...
>
> I have been unable to reproduce this behavior using matplotlib 0.72 
> under OS X 10.3.9 with wxPython 2.6.0.0.  What version of wxPython are 
> you running?
>
> Ken
>
Hm, 2.5.3.1. I know it's time to update my system, but this will have 
to wait for a while. I need to coordinate several modules / versions.

Anyway, thanks for looking into this. If it is really related to my wx 
version, there is no solution for me now. But then again, if I move my 
stuff to an updated Linux system soon, there should be no problem (at 
least not with wx ...).

Thanks,
Christian

Re: [Matplotlib-users] applying format to numbering

[John H. <jdh...@ac...>]

>>>>> "Christian" == Christian Meesters <mee...@un...> writes:
    Christian> Hm, 2.5.3.1. I know it's time to update my system, but
    Christian> this will have to wait for a while. I need to
    Christian> coordinate several modules / versions.

The figsize parameter is being respected for me on OSX 10.3 with
matplotlib 0.80 and wx 2.5.4.1.

Not sure if it is a matplotlib version or wxpythnon version that is
causing your problems. I looked through the CHANGELOG to see if there
were any obvious changes between 0.71 and 0.80 that indicated a bugfix
for wx figure sizing, but didn't see any.  You might also check the
commit notes for backend_wx or backend_wxagg.

JDH

Re: [Matplotlib-users] applying format to numbering

[Matt N. <new...@ca...>]

Christian,

I don't recall seeing this behavior of absurdly small figures
and no response to figsize argement, even using wxPython 2.5.3
on Mac OS X (though, admittedly I'm using matplotlib 0.8).

The script below works fine for me, and changing the figsize
argument to Figure() does change the figure size. Does this work
for you -- you might have to change the wxversion.select() line,
or just comment it out.  If this works for you, can you post a
simple, self-contained script that fails?

Cheers,

--Matt

#!/usr/bin/env python
import wxversion
wxversion.select('2.5.3-mac-ansi')
import wx
print 'using wxPython version ', wx.__version__

import matplotlib
matplotlib.use('WXAgg')
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
from matplotlib.figure import Figure

class SimpleFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self,None,-1, 'wx Matplotlib Frame')

        self.figure = Figure(figsize=(5,3),dpi=96)
        self.axes   = self.figure.add_subplot(111)
        self.canvas = FigureCanvas(self, -1, self.figure)
        self.sizer  = wx.BoxSizer(wx.VERTICAL)
        self.sizer.Add(self.canvas, 1, wx.LEFT|wx.TOP|wx.GROW|wx.EXPAND)
        self.SetSizer(self.sizer)
        self.Fit()
        
class App(wx.PySimpleApp):
    def OnInit(self):
        frame = SimpleFrame()
        frame.Show(True)
        return True

app = App(0)
app.MainLoop()
##############

Re: [Matplotlib-users] applying format to numbering

[Christian M. <mee...@un...>]

Thanks, Matt!
It took me a while to understand this: Your mini-script worked like 
expected. I could change the size easily. But my own program still 
didn't react to any change in the figsize parameter.
However, as soon as I took out the toolbar, everything was fine! There 
seems to be a conflict with the sizers, which I could not solve until 
now. I will dive into this and post an update, if I find a solution.

Cheers
Christian

On 29 May 2005, at 05:08, Matt Newville wrote:

> Christian,
>
> I don't recall seeing this behavior of absurdly small figures
> and no response to figsize argement, even using wxPython 2.5.3
> on Mac OS X (though, admittedly I'm using matplotlib 0.8).
>
> The script below works fine for me, and changing the figsize
> argument to Figure() does change the figure size. Does this work
> for you -- you might have to change the wxversion.select() line,
> or just comment it out.  If this works for you, can you post a
> simple, self-contained script that fails?
>
> Cheers,
>
> --Matt
>

Re: [Matplotlib-users] applying format to numbering

[Matt N. <new...@ca...>]

Christian,

Hmm, it does sound like there might be a sizer conflict. Do you
get the tiny-figurecanvase behavior with the embedding_in_wx*.py
examples??  These have toolbars, but start off with reasonable
sizes, and respond to resizing ok for me.

--Matt

Re: [Matplotlib-users] applying format to numbering

[Christian M. <mee...@un...>]

One - hopefully final - update:
As some might remember my original snippet was this:
class SAXS_wx(wx.Frame):
	def __init__(self,parent,id,title):
		wx.Frame.__init__(self,None,-1,"SPlot")
<snip>
		self.fig = Figure(figsize=(5,4),dpi=100)
		self.axes = self.fig.add_subplot(111)
		self.canvas = FigureCanvas(self, -1, self.fig)
		self.parent = self.canvas.GetParent()
		self.canvas.mpl_connect('motion_notify_event',self.mouse_move)
		sizer = wx.BoxSizer(wx.VERTICAL)
		self.sizer = sizer
		sizer.Add(self.canvas, 1, wx.LEFT|wx.TOP|wx.GROW|wx.EXPAND)
		
		self.add_splot_toolbar()
		
		self.SetSizer(self.sizer)
		self.Fit()

The problem was that changing the figsize parameter had no effect on 
the frame size. Changing to

self.SetSizer(self.sizer)
self.Fit()
self.add_splot_toolbar()

solved the problem, where add_splot_toolbar() - a toolbar function very 
much like the 2nd toolbar in the wx examples - is added only just after 
arranging the sizer. I was unable to arrange the toolbar with the sizer 
- regardless of the sizer and the layout I used. Hence the problem is 
definitively wx-related, possibly together with a problem in Panther's 
framework, since I find the old sequence of commands in the examples 
and the misbehaving canvas there as well.
May I suggest adding a comment in the examples for OSX users so that 
they are aware of a possible conflict there?

Thanks once more,
Christian

Re: [Matplotlib-users] applying format to numbering

[John H. <jdh...@ac...>]

>>>>> "Christian" == Christian Meesters <mee...@un...> writes:

    Christian> solved the problem, where add_splot_toolbar() - a
    Christian> toolbar function very much like the 2nd toolbar in the
    Christian> wx examples - is added only just after arranging the
    Christian> sizer. I was unable to arrange the toolbar with the
    Christian> sizer - regardless of the sizer and the layout I
    Christian> used. Hence the problem is definitively wx-related,
    Christian> possibly together with a problem in Panther's
    Christian> framework, since I find the old sequence of commands in
    Christian> the examples and the misbehaving canvas there as well.
    Christian> May I suggest adding a comment in the examples for OSX
    Christian> users so that they are aware of a possible conflict
    Christian> there?

Would you be willing to add the comments to one or more of the
embedding_in_wx*.py examples and send them to me?

Thanks!
JDH