skbio.stats.ordination.
scale
(a, weights=None, with_mean=True, with_std=True, ddof=0, copy=True)[source]¶Scale array by columns to have weighted average 0 and standard
State: Experimental as of 0.4.0. deviation 1.
a (array_like) – 2D array whose columns are standardized according to the weights.
weights (array_like, optional) – Array of weights associated with the columns of a. By default, the scaling is unweighted.
with_mean (bool, optional, defaults to True) – Center columns to have 0 weighted mean.
with_std (bool, optional, defaults to True) – Scale columns to have unit weighted std.
ddof (int, optional, defaults to 0) – If with_std is True, variance is calculated by dividing by n - ddof (where n is the number of elements). By default it computes the maximum likelyhood stimator.
copy (bool, optional, defaults to True) – Whether to perform the standardization in place, or return a new copy of a.
Scaled array.
2D ndarray
Notes
Wherever std equals 0, it is replaced by 1 in order to avoid division by zero.