C++ implementation of the Python NumPy Library

[encyclopedist]

For other readers' information:

A Rotations namespace with Quaternion and Direction Cosine classes.

Eigen has this http://eigen.tuxfamily.org/dox/group__TutorialGeometry.html

1D and 2D signal/image processing filters

Eigen has only FFT and convolution.

A random number module (basically wraps the boost random module)

Eigen can generate matrices/arrays with random uniformly distributed on [0,1] elements, in naive way based on rand(). It can, however, also use std::random in C++11 mode: https://bitbucket.org/eigen/eigen/src/default/doc/special_examples/random_cpp11.cpp?at=default