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# numpy.matrix.ptp

`matrix.``ptp`(axis=None, out=None)

  Peak-to-peak (maximum - minimum) value along the given axis.

  Refer to `numpy.ptp` for full documentation.

  See also

  `numpy.ptp`

  Notes

  Same as ndarray.ptp, except, where that would return an ndarray object, this returns a matrix object.

  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.ptp()
      11
      >>> x.ptp(0)
      matrix([[8, 8, 8, 8]])
      >>> x.ptp(1)
      matrix([[3],
              [3],
              [3]])

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