Discrete random element selection based on a user-specified distribution

Returns random elements from a set of discrete points according to a user-specified distribution.

The function takes as input a list of points (ids) and for each point a likelihood that it is selected randomly. The output is an array with random values which are distributed according to the input.

More information and example usage is provided at:
http://www.medical-image-processing.com/programming/discrete-random-element-selection-based-on-a-user-specified-probability