function variance(const E1 &) reducing¶

template <input_expression E1, typename T = expression_value_type<E1>>
KFR_FUNCTION T variance(const E1& x)

Computes the variance of the given input expression.

This function calculates the variance of the elements in the input expression x.

Template parameters

E1	The type of the input expression.
T	The value type of the expression elements.

Parameters

x	The input expression for which the variance is to be computed. Must be a sized expression.

Returns

The variance of the elements in the input expression.