eye(N, M=None, k=0, dtype=None, device=None, **kwargs)

Return a 2-D array with ones on the diagonal and zeros elsewhere.

  • N (int) – Number of rows in the output.

  • M (int, optional) – Number of columns in the output. If None, defaults to N.

  • k (int, optional) – Index of the diagonal: 0 (the default) refers to the main diagonal, a positive value refers to an upper diagonal, and a negative value to a lower diagonal.

  • dtype (data-type, optional) – Data-type of the returned array. When npx.is_np_default_dtype() returns False, default dtype is float32; When npx.is_np_default_dtype() returns True, default dtype is float64.

  • device (Device, optional) – Device context on which the memory is allocated. Default is mxnet.device.current_device().


I – An array where all elements are equal to zero, except for the k-th diagonal, whose values are equal to one.

Return type

ndarray of shape (N,M)


>>> np.eye(2, dtype=int)
array([[1, 0],
       [0, 1]], dtype=int64)
>>> np.eye(3, k=1)
array([[0., 1., 0.],
       [0., 0., 1.],
       [0., 0., 0.]])