Sparse tensor

Mars tensor supports sparse tensor, unfortunately, only 2-D sparse tensors are available for now. Multi-dimensional sparse tensors will be supported later.

Functions to create sparse tensor

mars.tensor.zeros Return a new tensor of given shape and type, filled with zeros.
mars.tensor.eye Return a 2-D tensor with ones on the diagonal and zeros elsewhere.
mars.tensor.identity Return the identity tensor.
mars.tensor.random.randint Return random integers from low (inclusive) to high (exclusive).