The official Graph Signal Processing Toolbox (GSPBox)
In Matlab type
gsp_start
as the first command from the installation directory. This will set up the correct paths.
The gsp_start command will add all the necessary subdirectories (so please don't add these manually), and it will print a statement telling you which backend you are currently using.
In Matlab type
gsp_make
as the first command from the installation directory. This will try to compile the mex interface for the third party components: AMD and LDL.
You need the library stdc++ to compile AMD and LDL. On Ubuntu you can type:
sudo apt-get install libstdc++6
In Matlab type
gsp_install
as the first command from the installation directory. This will try to download and install third party software.
You can find the complete online documentation here : http://lts2research.epfl.ch/gsp/doc/start/