eye¶

dragon.eye(
  n,
  m=None,
  k=0,
  dtype='float32',
  **kwargs
)[source]¶

Return a tensor constructed as the identity matrix.

\[\text{out} \leftarrow \text{diag}(1, 1, ..., 1) \]

The rows and cols of matrix are determined by n and m:

print(dragon.eye(2))     # [[1., 0.], [0., 1.]]
print(dragon.eye(2, 3))  # [[1., 0., 0.], [0., 1., 0.]]

The diagonal could be controlled by k:

• k > 0: Populate upper diagonal
• k = 0: Populate main diagonal
• k < 0: Populate lower diagonal

Parameters:

• n (int) – The number of output rows.
• m (int, optional) – The number of output cols.
• k (int, optional, default=0) – The index of diagonal.
• dtype (str, optional, default='float32') – The optional data type.

Returns:

dragon.Tensor – The output tensor.