- **MeeGo / Harmattan**
(*https://talk.maemo.org/forumdisplay.php?f=45*)

- - **[Announce] MatPlotLib - 2D & 3D plots for MeeGo Harmattan**
(*https://talk.maemo.org/showthread.php?t=80353*)

[Announce] MatPlotLib - 2D & 3D plots for MeeGo HarmattanMatPlotLib is a Python library for making 2D and 3D plots, usually using NumPy to calculate the data. See the MatPlotLib gallery to have an idea of which plots can be make using a Nokia N9/N950.Release history for MeeGo 1.2 Harmattan (see the version history "MatPlotLib What's New") : - MatPlotLib 1.3.1 (10/10/2013) first release for MeeGo 1.2 Harmattan (20/10/2014). New WebAgg backend (from a web browser) and many new features; - MatPlotLib 1.2.1-3 Harmattan release (12/10/2014). MatPlotLib is visible in MeeGo Harmattan Application Manager and is installed easier using Warehouse; - MatPlotLib 1.2.1-2 Harmattan release (15/06/2013); - MatPlotLib 1.2.1-1 (26/03/2013) released for MeeGo Harmattan (06/06/2013); - MatPlotLib 1.2.0-2 Harmattan release (12/02/2013); - MatPlotLib 1.2.0-1 (08/01/2013) released for MeeGo Harmattan (09/02/2013), with graphical backend (Qt4App/PySide) to interactively show plots. It also has animations and many more features; - MatPlotLib 1.0.0 (06/07/2010), released for MeeGo Harmattan in 24/11/2011, based on the Maemo 5 version of Simon Pickering.Manual installation and configuration, with only Agg backend. For MatPlotLib on Sailfish/Mer, see the topic "MatPlotLib - 2D & 3D plots for Sailfish". Examples and screenshots of MatPlotLib on MeeGo HarmattanSome graphics produced by using MatPlotLib 1.3.1 with NumPy 1.9.0 on a Nokia N9. See more examples in post #4. Download the .py (Python) script and using Terminal type in the the same directory the commands after the "$" : 2D plot of a function (sin) of one variable (takes 3.3 s). $ python simple_plot.py http://www.robertocolistete.net/matplotlib/figplot.png Qt4/PySide backend showing a plot of one variable, f=f(x), of a damped harmonic oscillator, see plotfx.py script in post #4, where the "savefig" command was commented and "show()" was uncommented : http://www.robertocolistete.net/MatP...Qt4backend.png 3D surface plot of a function of two variables (takes 3.9 s) : $ python surface3d_demo.py http://www.robertocolistete.net/matp...figsurface.png The same above, shown by the Qt4/PySide backend using "plt.show()" instead of "plt.savefig" in the script, allows to touch to rotate the 3D plot :http://www.robertocolistete.net/MatP...Qt4backend.png 2D vector field plot (takes 3.5 s): $ python convfield.py http://www.robertocolistete.net/matp.../convfield.png Installing MatPlotLib on MeeGo HarmattanSee post #33 if you want to install MatPlotLib 1.0.0. The instructions below are for MatPlotLib 1.3.1. MatPlotLib has 2 repositories options, so it can be : - easily installed by using Warehouse / OpenRepos.net. Install Warehouse (OpenRepos.net client) for MeeGo Harmattan, then open Warehouse, search for "MatPlotLib", enable the repository and install; - installed by using my Harmattan repository ("python-matplotlib" package). Warehouse showing MatPlotLib 1.3.1 available to install : http://www.robertocolistete.net/MatP...oHarmattan.png The MatPlotLib v1.3.1 takes 26MB, while its dependencies (NumPy >= 1.7.0 and "python-dateutil", "python-pyparsing", "python-tornado", "python-tz", etc) take additionally 32 MB after automatic installation. "python-pyside" (if not installed by many MeeGo Harmattan other softwares), will be installed, taking >= 16MB. MatPlotLib >= 1.3.x doesn't use '~/.matplotlib" configuration folder, but instead '~/.config/matplotlib". So upgrading from MatPlotLib < 1.3 to >= 1.3, then remove the older folder. Or, to remove any conflicting configuration of MatPlotLib 1.0.0 (previous versions), type in Terminal as user : $ cd ~ $ rm -rf .matplotlib The default backend is Qt4/PySide interactive graphical backend. If you don't want to use an interactive graphical backend by default, then as user in Terminal, type : $ cd ~ $ mkdir .config/matplotlib $ echo 'backend : Agg' > .config/matplotlib/matplotlibrc so the Agg non interactive backend becomes the default one. With non interactive backend, the plots are not shown in the screen and can only be saved to PNG, PDF, PS and SVG files (by using "savefig" command). The WebAgg backend is also available on MatPlotLib >= 1.3, so the figures are displayed in a web browser with the URL http://127.0.0.1:8988/, it is interactive and suppport MatPlotLib animations. If you want to use the WebAgg backend by default, then in Terminal, type : $ cd ~ $ mkdir .config/matplotlib $ echo 'backend : WebAgg' > .config/matplotlib/matplotlibrc Using MatPlotLib on MeeGo HarmattanIt is strongly suggested to also install IPython for MeeGo Harmattan, so the interactive use of MatPlotLib/NumPy becomes a lot easierWith the new IPython 0.13.1-2 Harmattan, there are 3 interfaces : IPython terminal, IPython Notebook and IPython Qt console. As a simple example (just type the text after the "In [n]:" lines) in IPython terminal : http://www.robertocolistete.net/matp...9_terminal.png In [1]: from pylab import * In [2]: x = randn(10000); hist(x, 100) In [3]: savefig('histogram.png') In [4]: show() The 1st line loads NumPy and MatPlotLib by using PyLab. The 2nd line calculates 10 thousand random numbers using NumPy, and makes a histogram (not shown in the screen). The 3rd line saves the histogram to a PNG file 'histogram.png' in the current directory (it could be a PDF figure, just use '.pdf' extension). Yeah, your Nokia N9 can easily create PDF files of plots ! The 4th line shows the plot in the interactive Qt4/PySide default backend of MatPlotLib >= 1.2, see below : http://www.robertocolistete.net/matp...Qt4backend.png The interactive Qt4/PySide default backend is not touch friendly (as there is no mouse and the N9/N950 screen is small compared to a desktop PC), so only some features are practical to use. But it shows the plot in full screen since MatPlotLib >= 1.2 Harmattan (12/02/20130 allows to rotate 3D plots, etc. To run IPython with PyLab (NumPy + MatPlotLib) in interactive mode in Terminal, there are many options : - tap the IPython icon (v0.13.1), then type "%pylab"; - open the Terminal, type "ipython", then type "%pylab"; - open the Terminal, type "ipython --pylab". See post #42 for time measurements of MatPlotLib 1.3 x 1.2 x 1.0 with NumPy 1.7 and 1.9. Or older post #32 for time measurements of MatPlotLib 1.2 x 1.0 with NumPy 1.4 and 1.7. IPython Notebook and IPython Qt console also support inline plots, just type "%pylab inline" inside the IPython Notebook session : http://www.robertocolistete.net/ipyt...-0.13.1_N9.png Or IPython Qt console session : http://www.robertocolistete.net/ipyt...-0.13.1_N9.png Documentation and Examples for MatPlotLibMatPlotLib documentation is online in the official MatPlotLib site, in PDF format (63MB and more than 2,6 thousand pages), or help available in interactive mode by typing : - "help(matplotlib)", after an "import matplotlib"; - "help(pylab)" or "help(pylab.matplotlib)", when using PyLab. The package "python-matplotlib-doc_*.deb" only contains examples, but anyway it is purged as everything is in "/usr/share/doc/". There is more than one hundred source code examples (.py Python files) in : MatPlotLib gallery MatPlotLib screenshots MatPlotLib examples list which can run on Nokia N9/N950. MatPlotLib is often used together with NumPy (for numerical calculations in Python), so see topic about NumPy for MeeGo Harmattan. For making plots with calculations using derivatives, integrals, etc, then SymPy is also available for MeeGo Harmattan : SymPy (Computer Algebra System) for Maemo 4 & 5 & 6 By the way, be a N9/N950 proud user : MatPlotLib >= 1.2 is only available for Linux, Windows, Mac OS, iOS, Sailfish and MeeGo 1.2 Harmattan. Next steps for MatPlotLib on MeeGo Harmattan : - (DONE, see this post and post #4) show easy script examples (with documentation) to make the most useful plots; - (DONE, see my Harmattan repository) release MatPlotLib packages in a public MeeGo Harmattan repository (App); - (DONE, now with MatPlotLib 1.2.0 there is a interactive backend on Nokia N9/N950) try to release MatPlotLib 1.1 or 1.2, which includes animations, PySide compatibility (so, maybe, I say, maybe, interactive backend could run on Nokia N9/950); - (DONE, see MatPlotLib 1.2.0 Harmattan2) try to show Qt4/PySide backend in full screen; - release MatPlotLib 1.4.x; - release softwares depending on MatPlotLib/Numpy with easy to use interface (in Qt Quick) to make from simple to complex plots of functions of 1 or 2 variables, of experimental data with error bars, eletrical vector field/potential, etc. Python for MeeGo Harmattan More Python packages are listed in the Python Harmattan Wiki. See also OpenRepos.net. |

Re: [Announce] MatPlotLib - 2D & 3D plots for MeeGo Harmattanfrom pylab import *
does not work for me after your described procedure: No module named pylab |

Re: [Announce] MatPlotLib - 2D & 3D plots for MeeGo HarmattanQuote:
Also check if, using Terminal : $ apt-cache show python-matplotlib shows a lot of information about the package (to confirm if it is installed). |

Re: [Announce] MatPlotLib - 2D & 3D plots for MeeGo HarmattanQuote:
:rolleyes: |

Re: [Announce] MatPlotLib - 2D & 3D plots for MeeGo HarmattanQuote:
This fixed it: Code:
`apt-get install python-central` |

Re: [Announce] MatPlotLib - 2D & 3D plots for MeeGo HarmattanWill it be possible to have the QT iPython console on the N9 some day?
http://ipython.org/ipython-doc/dev/i...qtconsole.html |

Re: [Announce] MatPlotLib - 2D & 3D plots for MeeGo HarmattanQuote:
The installation instructions are now fixed and complete. Thank you very much. |

Re: [Announce] MatPlotLib - 2D & 3D plots for MeeGo HarmattanQuote:
But my priority is to (try to) release MatPlotLib 1.1 with a possible Qt backend running on Nokia N9/N950. |

Re: [Announce] MatPlotLib - 2D & 3D plots for MeeGo HarmattanHello !
I had just a little problem when i try to install the Library... When i enter this command : " # dpkg -i python-matplotlib-data_1.0.0-1_all.deb " My N9 returning this error : "Aegis rejecting python-matplotlib-data_1.0.0-1_all.deb : Could not open debian archive Aegis aborting dpkg -- all listed package files rejected Sorry for my approxymatly english .. i'm french ^^ |

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