Updated the 1st post with easier installation instructions (using my Harmattan repository), and easier use of MatPlotLib with IPython 0.13.1 Notebook or Qt console.

(09/02/2013) MatPlotLib 1.2.0 is now released for MeeGo Harmattan, just 1 month after the upstream release (08/01/2013), with interactive graphical backend on Nokia N9/N950 and many new features.

MatPlotLib 1.2.0 Harmattan is based on Ubuntu 13.04 version and MatPlotLib 1.2.0 source code, without Python 3 support, no debug package, adapted dependencies to MeeGo Harmattan, etc.

See 1st post por details about installing and using MatPlotLib 1.2.0.

Time to load MatPlotLib 1.2.0 on Nokia N9 :
- 0.7-0.9 s via "from matplotlib import *" ;
- 2.0-2.3 s (with NumPy 1.4.1 or 1.7.0) via "import pylab" or "from pylab import *".
Comparing with MatPlotLib 1.0.0 :
- 0.7-0.9 s via "from matplotlib import *" ;
- 1.5-1.7 s (with NumPy 1.4.1 or 1.7.0) via "import pylab" or "from pylab import *".

Benchmarks of MatPlotLib examples (see posts #1 and #4) with NumPy 1.4.1 (from Nokia repositories) on Nokia N9 :
simple_plot.py : 2.9s (1.0.0), 4.4s (1.2.0)
surface3d_demo.py : 10.0s (1.0.0), 9.7s (1.2.0)
convfield.py : 2.8s (1.0.0), 4.6s (1.2.0)
plotfx.py : 6.1s (1.0.0), 8.4s (1.2.0)
contourfxy.py : 7.4s (1.0.0), 10.2s (1.2.0)
densityfxy.py : 7.5s (1.0.0), 10.3s (1.2.0)
vectorfieldFxy.py : 5.8s (1.0.0), 8.2s (1.2.0)
surfacefxy.py : 19.7s (1.0.0), 16.6s (1.2.0)

The same, but using new NumPy 1.7.0 on Nokia N9 :
simple_plot.py : 3.2s (1.0.0), 4.8s (1.2.0)
surface3d_demo.py : 12.1s (1.0.0), 10.9s (1.2.0)
convfield.py : 3.2s (1.0.0), 4.8s (1.2.0)
plotfx.py : 6.4s (1.0.0), 8.9s (1.2.0)
contourfxy.py : 8.3s (1.0.0), 10.9s (1.2.0)
densityfxy.py : 8.0s (1.0.0), 10.6s (1.2.0)
vectorfieldFxy.py : 6.5s (1.0.0), 8.6s (1.2.0)
surfacefxy.py : 22.8s (1.0.0), 19.0s (1.2.0)

As we see above :
- MatPlotLib 1.2.0 is slower than v1.0.0, except for surface 3D plots;
- using NumPy 1.7.0 is slower than v1.4.1.

If anyone still wants old MatPlotLib 1.0.0 for some reason :

1) download from my Harmattan repository :
python-matplotlib-data_1.0.0-1_all.deb
python-matplotlib_1.0.0-1_armel.deb

2) install dependencies, as root in Terminal :
# apt-get install python-central python-support python-numpy python-dateutil python-gobject python-cairo

3) install MatPlotLib 1.0.0, again as root in Terminal, in the same directory where the files where downloaded :
# dpkg -i python-matplotlib-data_1.0.0-1_all.deb
# dpkg -i python-matplotlib_1.0.0-1_armel.deb

4) configure MatPlotLib 1.0.0, in Terminal as root :
# mkdir /usr/lib/python2.6/dist-packages/matplotlib/mpl-data
As user :
$ cd ~
$ rm -rf .matplotlib
$ mkdir .matplotlib
$ echo 'datapath : /usr/share/matplotlib/mpl-data' > .matplotlib/matplotlibrc
MatPlotLib 1.0.0 has no interactive graphical backend, so "show()" doesn't work, instead use "savefig" command to save plots to files.

MatPlotLib 1.2.0 is a lot simpler to install (see 1st post) and has more features on MeeGo Harmattan. See the benchmark of MatPlotLib 1.0.0 x 1.2.0 in the previous post.

NumPy 1.7.0 is released today (11/02/2013), just one day after the mainstream release.

MatPlotLib is compatible with both NumPy 1.4.1 (from Nokia repositories) and v1.7.0 (from my Harmattan repository). See the benchmarks in post #32 above.

MatPlotLib 1.2.0 Harmattan1 from 09/02/2013 had an error (dependency of NumPy limited to v1.5) which was fixed late yesterday (10/02/2013). So who installed MatPlotLib 1.2.0 in 09-10/02/2013, please reinstall it, as root in Terminal :
# apt-get install --reinstall python-matplotlib

This is an awesome program !!!
Thank you developer

(12/02/2013) MatPlotLib 1.2.0-2 Harmattan is released, now the interactive Qt4/PySide default backend opens in full screen, so Nokia N9/N950 screen is better used.

See the 1st post to install/update, i.e., "apt-get update" then "apt-get install python-matplotlib" as root in Terminal.

Before the new release : Ahahhh, I've figured out how to show the Qt4/PySide backend in full screen Just one new line of code, PyQt4/PySide rocks ! And it deserves a new version : Matplotlib 1.2.0 Harmattan2.

See the new IPython 0.13.1-3 which fixes the bug which prevented dialog boxes to work on Qt4 backend, so save button, vkb on text fields, etc, don't work .

With MatPlotLib 1.2.0-2 and IPython 0.13.1-3, your Nokia N9/N950 will show Qt4/PySide backend in full screen and with working dialogs boxes.

(06/06/2013) MatPlotLib 1.2.1 is released for MeeGo Harmattan.

MatPlotLib 1.2.1 (26/03/2013) is an upstream bug fix release for v1.2.0 (08/01/2013).

It needs NumPy >= 1.7.x, even if it asks for NumPy 1.4.1. See next version for this dependency fix.

MatPlotLib 1.2.1 Harmattan is based on Ubuntu 13.04 version and MatPlotLib 1.2.1 source code, without Python 3 support, no debug package, adapted dependencies to MeeGo Harmattan, etc.

See the 1st post to install/update, i.e., "apt-get update" then "apt-get install python-matplotlib" as root in Terminal.

(15/06/2013) MatPlotLib 1.2.1-2 Harmattan released, just to force NumPy 1.7.x as dependency.

For some reason, MatPlotLib 1.2.1 needs NumPy 1.7.x to compile and also to run, while MatPlotLib 1.2.0 only needed NumPy 1.4.0.

Thanks, irulestar. There is a depency, "python-dateutil", needed by MatPlotLib 1.2.1 but not listed. Until I release a new MatPlotLib version (1.3.1 or 1.4.0) in the following days, a workaround is to install "python-dateutil" in Terminal (with developer mode on) :
$ devel-su
then type the root password (default is 'rootme'), then
# apt-get install python-dateutil