mxnet.np.ediff1d¶
-
ediff1d
(ary, to_end=None, to_begin=None)¶ The differences between consecutive elements of an array.
- Parameters
ary (ndarray) – If necessary, will be flattened before the differences are taken.
to_end (ndarray or scalar, optional) – Number(s) to append at the end of the returned differences.
to_begin (ndarray or scalar, optional) – Number(s) to prepend at the beginning of the returned differences.
- Returns
ediff1d – The differences. Loosely, this is
ary.flat[1:] - ary.flat[:-1]
.- Return type
ndarray
Examples
>>> x = np.array([1, 2, 4, 7, 0]) >>> np.ediff1d(x) array([ 1., 2., 3., -7.])
>>> np.ediff1d(x, to_begin=-99, to_end=np.array([88, 99])) rray([-99., 1., 2., 3., -7., 88., 99.])
The returned array is always 1D.
>>> y = np.array([[1, 2, 4], [1, 6, 24]]) >>> np.ediff1d(y) array([ 1., 2., -3., 5., 18.])
>>> np.ediff1d(x, to_begin=y) array([ 1., 2., 4., 1., 6., 24., 1., 2., 3., -7.])
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