scipy.cluster.hierarchy.from_mlab_linkage

scipy.cluster.hierarchy.from_mlab_linkage(Z)

Converts a linkage matrix generated by MATLAB(TM) to a new linkage matrix compatible with this module. The conversion does two things:

• the indices are converted from 1..N to 0..(N-1) form, and
• a fourth column Z[:,3] is added where Z[i,3] is represents the number of original observations (leaves) in the non-singleton cluster i.

This function is useful when loading in linkages from legacy data files generated by MATLAB.

Arguments :

• Z : ndarray

  A linkage matrix generated by MATLAB(TM)

Returns :

• ZS : ndarray

  A linkage matrix compatible with this library.