TensorFlow 1 version View source on GitHub

Converts a SparseTensor into a dense tensor.

    sp_input, default_value=None, validate_indices=True, name=None

Used in the notebooks

Used in the guide

This op is a convenience wrapper around sparse_to_dense for SparseTensors.

For example, if sp_input has shape [3, 5] and non-empty string values:

[0, 1]: a
[0, 3]: b
[2, 0]: c

and default_value is x, then the output will be a dense [3, 5] string tensor with values:

[[x a x b x]
 [x x x x x]
 [c x x x x]]

Indices must be without repeats. This is only tested if validate_indices is True.


  • sp_input: The input SparseTensor.
  • default_value: Scalar value to set for indices not specified in sp_input. Defaults to zero.
  • validate_indices: A boolean value. If True, indices are checked to make sure they are sorted in lexicographic order and that there are no repeats.
  • name: A name prefix for the returned tensors (optional).


A dense tensor with shape sp_input.dense_shape and values specified by the non-empty values in sp_input. Indices not in sp_input are assigned default_value.


  • TypeError: If sp_input is not a SparseTensor.