mars.tensor.eye

mars.tensor.eye(N, M=None, k=0, dtype=None, sparse=False, gpu=False, chunk_size=None, order='C')[source]

Return a 2-D tensor 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 tensor.
sparse: bool, optional
Create sparse tensor if True, False as default
gpu : bool, optional
Allocate the tensor on GPU if True, False as default
chunk_size : int or tuple of int or tuple of ints, optional
Desired chunk size on each dimension
order : {‘C’, ‘F’}, optional
Whether the output should be stored in row-major (C-style) or column-major (Fortran-style) order in memory.
I : Tensor of shape (N,M)
An tensor where all elements are equal to zero, except for the k-th diagonal, whose values are equal to one.

identity : (almost) equivalent function diag : diagonal 2-D tensor from a 1-D tensor specified by the user.

>>> import mars.tensor as mt
>>> mt.eye(2, dtype=int).execute()
array([[1, 0],
       [0, 1]])
>>> mt.eye(3, k=1).execute()
array([[ 0.,  1.,  0.],
       [ 0.,  0.,  1.],
       [ 0.,  0.,  0.]])