Supported Distributions

[jknox13]

Standardize the set of sampling distributions. As of now we use the following:

• 'guassian' or 'normal': np.random.standard_normal
• 'uniform': np.random.uniform(-1, 1)
• 'None': np.random.rand
  And also from csvd
• 'spixel': random sampling of rows
• 'sparse': np.sparse.rand

After we agree on the set of sampling distributions, we can incorporate them into
the sketch function to reduce code repetition and limit the set of distributions
on an algorithm by algorithm basis if needed (i.e. if rsvd and rdmd
should not have the same set of distributions available).

[erichson]

Yes, that is a great idea to unify the sketch functionality across all functions. It will us also allow to easily add some additional sketching schemes in a future version.