Difference between revisions of "Matlab"
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[[Category:Mathematics and science]]  [[Category:Mathematics and science]]  
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From the [http://www.mathworks.com/products/matlab/ official website]:  From the [http://www.mathworks.com/products/matlab/ official website]:  
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== Troubleshooting ==  == Troubleshooting ==  
−  As one installs Matlab, it might complain that it  +  As one installs Matlab, it might complain that it cannot find a package, for the most part just look at the package name and then install it with [[Pacman]], or in the case of x86_64 there are some libraries only in [[AUR]]. 
−  +  === License: invalid machine id ===  
The installer may complain about an invalid machine id, because it is looking for a network interface named eth0 to get a MAC address for activation, while new Arch Linux setups do not have a network interface called eth0 (systemd uses [http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames Predictable Network Interface Names]).  The installer may complain about an invalid machine id, because it is looking for a network interface named eth0 to get a MAC address for activation, while new Arch Linux setups do not have a network interface called eth0 (systemd uses [http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames Predictable Network Interface Names]).  
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The machine id should now be different than 000000000000 and you should be able to install and activate MATLAB without problems.  The machine id should now be different than 000000000000 and you should be able to install and activate MATLAB without problems.  
−  +  === Resolving start warnings/errors ===  
* Even if all needed libraries are installed, Matlab when starting can still report some missing libraries. This is resolved by symbolic linking of needed libraries to directories that Matlab checks at startup. For example, if Matlab triggers error/warning about missing {{ic/lib64/libc.so.6}} library, this can be resolved by:  * Even if all needed libraries are installed, Matlab when starting can still report some missing libraries. This is resolved by symbolic linking of needed libraries to directories that Matlab checks at startup. For example, if Matlab triggers error/warning about missing {{ic/lib64/libc.so.6}} library, this can be resolved by:  
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export MATLAB_JAVA=/usr/lib/jvm/java7openjdk/jre  export MATLAB_JAVA=/usr/lib/jvm/java7openjdk/jre  
−  +  === MATLAB crashes when displaying graphics ===  
To identify this error, start MATLAB with  To identify this error, start MATLAB with  
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sudo ln s /usr/lib/libstdc++.so.6  sudo ln s /usr/lib/libstdc++.so.6  
−  +  === Blank/grey UI when using DWM/Awesome ===  
wmname LG3D  wmname LG3D 
Revision as of 03:25, 21 December 2013
Related articles
From the official website:
 MATLAB is a highlevel language and interactive environment for numerical computation, visualization, and programming. Using MATLAB, you can analyze data, develop algorithms, and create models and applications. The language, tools, and builtin math functions enable you to explore multiple approaches and reach a solution faster than with spreadsheets or traditional programming languages, such as C/C++ or Java.
Contents
General installation
MATLAB 2013a+ should install fine with the install script provided by MATLAB, without any additional packages.
To install from an iso file:
# modprobe loop # mount o loop matlab.iso /mnt/ # /mnt/install
Additionally, install xorgfonts100dpi, xorgfonts75dpi, and xorgfontstype1 so fonts are displayed properly in figures.
Create Desktop and Menu Shortcuts
If you choose Custom in Installation Type, the symlink will be created automatically. Otherwise, you may need to manually create a symlink in /usr/local/bin
to make it easier to launch in terminal:
# ln s /{MATLAB}/bin/matlab /usr/local/bin
To create a menu item, we need to get a icon first:
# curl http://upload.wikimedia.org/wikipedia/commons/2/21/Matlab_Logo.png o /usr/share/icons/matlab.png
Then create a new .desktop file in /usr/share/applications
with following lines:
/usr/share/applications/matlab.desktop
#!/usr/bin/env xdgopen [Desktop Entry] Type=Application Icon=/usr/share/icons/matlab.png Name=MATLAB Comment=Start MATLAB  The Language of Technical Computing Exec=env u _JAVA_OPTIONS matlab desktop nosplash r "cd('%d'); edit '%f'" Categories=Development; MimeType=text/xmatlab;
The Exec
command line is composed as follows:

desktop
is a flag needed to run matlab without a terminal. 
nosplash
is a flag preventing the splash screen from showing and taking up a temporary space in your task bar. 
env u _JAVA_OPTIONS
prevents the creation of a .java.logfile in your home directory by unsetting$_JAVA_OPTIONS
. Java prints all options set this way to stdout, and matlab treats everything in stdout as error worth a log. 
r '...'
executes matlab code on startup:
cd('%d')
This changes the working directory of matlab to the opened file’s directory. 
edit '%f'
This spawns an editor tab for the file.

You can also put this .desktop file in the ~/Desktop directory to create a shortcut.
More details see MATLAB  Community Ubuntu Documents
Install supported compiler
In order for Matlab to work with C code (needed for simulink) it is necessarry to install a supported compiler. Install gcc44^{AUR} from the AUR.
Then edit ${MATLAB}/bin/mexopts.sh
and replace all occurances of CC='gcc' with CC='gcc4.4' and CXX='g++' with CXX='g++4.4'. Afterwards run
mex setup
in Matlab and select the mexopts.sh
file.
Troubleshooting
As one installs Matlab, it might complain that it cannot find a package, for the most part just look at the package name and then install it with Pacman, or in the case of x86_64 there are some libraries only in AUR.
License: invalid machine id
The installer may complain about an invalid machine id, because it is looking for a network interface named eth0 to get a MAC address for activation, while new Arch Linux setups do not have a network interface called eth0 (systemd uses Predictable Network Interface Names).
To fix this change the name of the interface.
The machine id should now be different than 000000000000 and you should be able to install and activate MATLAB without problems.
Resolving start warnings/errors
 Even if all needed libraries are installed, Matlab when starting can still report some missing libraries. This is resolved by symbolic linking of needed libraries to directories that Matlab checks at startup. For example, if Matlab triggers error/warning about missing
/lib64/libc.so.6
library, this can be resolved by:
# ln s /lib/libc.so.6 /lib64
 Matlab R2011b with an uptodate Arch Linux (as of March 12, 2012) fails on startup with the familiar "Failure loading desktop class." A solution is to point Matlab to the system JVM (confirmed to work with the jdk7openjdk package):
export MATLAB_JAVA=/usr/lib/jvm/java7openjdk/jre
MATLAB crashes when displaying graphics
To identify this error, start MATLAB with
LIBGL_DEBUG=verbose matlab
from the terminal and try to collect OpenGL information with opengl info
from the MATLAB command prompt. If it crashes again and there is an output line like
libGL error: dlopen /usr/lib/xorg/modules/dri/swrast_dri.so failed (/usr/local/MATLAB/R2011b/bin/glnxa64/../../sys/os/glnxa64/libstdc++.so.6: version `GLIBCXX_3.4.15' not found (required by /usr/lib/xorg/modules/dri/swrast_dri.so))
then the problem is that MATLAB uses its own GNU C++ library, which is an older version than the uptodate version on your Archlinux system. Make MATLAB use the current C++ library for your system by
cd /usr/local/MATLAB/R(your release)/sys/os/glnxa64 sudo unlink libstdc++.so.6 sudo ln s /usr/lib/libstdc++.so.6
Blank/grey UI when using DWM/Awesome
wmname LG3D
OpenGL Acceleration
Once Matlab is installed type the following in the interpreter:
>> opengl info
The output should be similar to the following:
Version = 2.0 Mesa 7.8.2 Vendor = Advanced Micro Devices, Inc. Renderer = Mesa DRI R600 (RV710 9552) 20090101 x86/MMX/SSE2 TCL DRI2 MaxTextureSize = 4096 Visual = 0xcb (TrueColor, depth 24, RGB mask 0xff0000 0xff00 0x00ff) Software = false # of Extensions = 107 Driver Bug Workarounds: OpenGLBitmapZbufferBug = 0 OpenGLWobbleTesselatorBug = 0 OpenGLLineSmoothingBug = 0 OpenGLClippedImageBug = 0 OpenGLEraseModeBug = 0
This will vary with card you are using, but the important part is "Software = false". If it's not "false" for you, then there is a problem with your hardware acceleration.
NVIDIA
With an NVIDIA card, the output should be similar to this:
>> opengl info Version = 2.1.2 NVIDIA 177.82 Vendor = NVIDIA Corporation Renderer = Quadro NVS 140M/PCI/SSE2 MaxTextureSize = 8192 Visual = 0x21 (TrueColor, depth 16, RGB mask 0xf800 0x07e0 0x001f) Software = false # of Extensions = 144 Driver Bug Workarounds: OpenGLBitmapZbufferBug = 0 OpenGLWobbleTesselatorBug = 0 OpenGLLineSmoothingBug = 0 OpenGLClippedImageBug = 1 OpenGLEraseModeBug = 0
With the NVIDIA card all it required to start working was to copy the libGLU.so
from the Matlab installed library ${MATLAB}/sys/opengl/lib/glnx86/libGLU.so
to /usr/lib directory
. Note that in x86_64 this might be a different directory.