composition_stats.center

composition_stats.center(mat)

Compute the geometric average of data.

Parameters

matarray_like

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

Returns

array_like, np.float64

central composition

Examples

>>> import numpy as np
>>> from composition_stats import center
>>> X = np.array([[.1,.3,.4, .2],[.2,.2,.2,.4]])
>>> center(X)
array([ 0.14854315,  0.25728427,  0.29708629,  0.29708629])