chaospy.Std

chaospy.Std(poly, dist=None, **kws)

Standard deviation.

Args:

poly (numpoly.ndpoly, Distribution):

Input to take variance on.

dist (Distribution):

Defines the space the variance is taken on. It is ignored if poly is a distribution.

Returns:

(numpy.ndarray):

Element for element variance along poly, where variation.shape == poly.shape.

Examples:

>>> dist = chaospy.J(chaospy.Gamma(1, 1), chaospy.Normal(0, 2))
>>> chaospy.Std(dist)
array([1., 2.])
>>> q0, q1 = chaospy.variable(2)
>>> poly = chaospy.polynomial([1, q0, q1, 10*q0*q1-1])
>>> chaospy.Std(poly, dist)
array([ 0.        ,  1.        ,  2.        , 28.28427125])