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tf.sparse.eye

Creates a two-dimensional sparse tensor with ones along the diagonal.

num_rows Non-negative integer or int32 scalar tensor giving the number of rows in the resulting matrix.
num_columns Optional non-negative integer or int32 scalar tensor giving the number of columns in the resulting matrix. Defaults to num_rows.
dtype The type of element in the resulting Tensor.
name A name for this Op. Defaults to "eye".

A SparseTensor of shape [num_rows, num_columns] with ones along the diagonal.