method
matrix.var(axis=None, dtype=None, out=None, ddof=0)
Returns the variance of the matrix elements, along the given axis.
Refer to
for full documentation.
Notes
This is the same as
, except that where an
would be returned, a
object is returned instead.
Examples
>>> x=np.matrix(np.arange(12).reshape((3,4)))>>> xmatrix([[ 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]])