numpy.matrix.max

method

matrix.max(axis=None, out=None)

返回沿轴的最大值.

参数:

有关完整说明,请参见 amax .

参见

amax , ndarray.max

注释

这与 ndarray.max 相同,但返回一个 matrix 对象,而 ndarray.max 将返回一个 ndarray.

示例

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>>> x = np.matrix(np.arange(12).reshape((3,4))); x
matrix([[ 0,  1,  2,  3],
        [ 4,  5,  6,  7],
        [ 8,  9, 10, 11]])
>>> x.max()
11
>>> x.max(0)
matrix([[ 8,  9, 10, 11]])
>>> x.max(1)
matrix([[ 3],
        [ 7],
        [11]])

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