We can retrieve the source code for NumPy with git as follows:

$ git clone git://github.com/numpy/numpy.git numpy

Alternatively, download the source from http://sourceforge.net/projects/numpy/files/.

Install in /usr/local with the following command:

$ python setup.py build
$ [sudo] python setup.py install --prefix=/usr/local

To build, we need a C compiler such as GCC and the Python header files in the python-dev or python-devel packages.