skbio.stats.composition.centralize#

skbio.stats.composition.centralize(mat)[source]#

Center data around its geometric average.

Parameters:

matarray_like of shape (n_compositions, n_components): A matrix of proportions.

Returns:

ndarray of shape (n_compositions, n_components): Centered composition matrix.

Examples

>>> import numpy as np
>>> from skbio.stats.composition 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]])