# tf.sparse.reduce_sum

Computes the sum of elements across dimensions of a SparseTensor. (deprecated arguments) (deprecated arguments)

### Aliases:

``````tf.sparse.reduce_sum(
sp_input,
axis=None,
keepdims=None,
reduction_axes=None,
keep_dims=None
)
``````

This Op takes a SparseTensor and is the sparse counterpart to `tf.reduce_sum()`. In particular, this Op also returns a dense `Tensor` instead of a sparse one.

Reduces `sp_input` along the dimensions given in `reduction_axes`. Unless `keepdims` is true, the rank of the tensor is reduced by 1 for each entry in `reduction_axes`. If `keepdims` is true, the reduced dimensions are retained with length 1.

If `reduction_axes` has no entries, all dimensions are reduced, and a tensor with a single element is returned. Additionally, the axes can be negative, similar to the indexing rules in Python.

#### For example:

``````# 'x' represents [[1, ?, 1]
#                 [?, 1, ?]]
# where ? is implicitly-zero.
tf.sparse.reduce_sum(x) ==> 3
tf.sparse.reduce_sum(x, 0) ==> [1, 1, 1]
tf.sparse.reduce_sum(x, 1) ==> [2, 1]  # Can also use -1 as the axis.
tf.sparse.reduce_sum(x, 1, keepdims=True) ==> [[2], [1]]
tf.sparse.reduce_sum(x, [0, 1]) ==> 3
``````

#### Args:

• `sp_input`: The SparseTensor to reduce. Should have numeric type.
• `axis`: The dimensions to reduce; list or scalar. If `None` (the default), reduces all dimensions.
• `keepdims`: If true, retain reduced dimensions with length 1.
• `reduction_axes`: Deprecated name of `axis`.
• `keep_dims`: Deprecated alias for `keepdims`.

#### Returns:

The reduced Tensor.