Classe « matrix »

Méthode numpy.matlib.matrix.var

Signature de la méthode var

def var(self, axis=None, dtype=None, out=None, ddof=0) 

Description

var.__doc__

        Returns the variance of the matrix elements, along the given axis.

        Refer to `numpy.var` for full documentation.

        See Also
        --------
        numpy.var

        Notes
        -----
        This is the same as `ndarray.var`, except that where an `ndarray` would
        be returned, a `matrix` object is returned instead.

        Examples
        --------
        >>> x = np.matrix(np.arange(12).reshape((3, 4)))
        >>> x
        matrix([[ 0,  1,  2,  3],
                [ 4,  5,  6,  7],
                [ 8,  9, 10, 11]])
        >>> x.var()
        11.916666666666666
        >>> x.var(0)
        matrix([[ 10.66666667,  10.66666667,  10.66666667,  10.66666667]]) # may vary
        >>> x.var(1)
        matrix([[1.25],
                [1.25],
                [1.25]])