Voir la source de Matplotlib 1.3.1 to 1.4.2 in ubuntu 14.04

'''UPGRADING FROM MATPLOTLIB 1.3.1 TO 1.4.2 IN UBUNTU 14.04'''

 The preferred method for installing matplotlib is to use the default package manager for you system. In Ubuntu the default package manager is APT and can be used to install packages in the following way:

 sudo apt-get install python-matplotlib
 This method however failed to upgrade to the newest version so I attempted to upgrade using the python package manager (PIP)

 sudo pip install --upgrade matplotlib
 This also failed, finally after some digging I came across this page in which they confirm that a bug is the reason PIP is failing and that a workaround can be found by installing libreetype6-dev

 # Install libfreetype6-dev
 sudo apt-get install libfreetype6-dev

 # Upgrade to matplotlib 1.4 using PIP
 sudo pip install --upgrade matplotlib