composition_stats.centralize

composition_stats.centralize(mat)

Center data around its geometric average.

Parameters

matarray_like, float

a matrix of proportions where rows = compositions and columns = components each composition (row) must add up to unity (see closure())

Returns

numpy.ndarray

centered composition matrix

Examples

>>> import numpy as np
>>> from composition_stats import centralize
>>> X = np.array([[.1,.3,.4, .2],[.2,.2,.2,.4]])
>>> centralize(X)
array([[ 0.17445763,  0.30216948,  0.34891526,  0.17445763],
       [ 0.32495488,  0.18761279,  0.16247744,  0.32495488]])