Computes number of nonzero elements across dimensions of a tensor. (deprecated arguments) (deprecated arguments)
tf.compat.v1.count_nonzero( input_tensor=None, axis=None, keepdims=None, dtype=tf.dtypes.int64, name=None, reduction_indices=None, keep_dims=None, input=None )
Reduces input_tensor
along the dimensions given in axis
. Unless keepdims
is true, the rank of the tensor is reduced by 1 for each entry in axis
. If keepdims
is true, the reduced dimensions are retained with length 1.
If axis
has no entries, all dimensions are reduced, and a tensor with a single element is returned.
Note: Floating point comparison to zero is done by exact floating point equality check. Small values are not rounded to zero for purposes of the nonzero check.
x = tf.constant([[0, 1, 0], [1, 1, 0]]) tf.math.count_nonzero(x) # 3 tf.math.count_nonzero(x, 0) # [1, 2, 0] tf.math.count_nonzero(x, 1) # [1, 2] tf.math.count_nonzero(x, 1, keepdims=True) # [[1], [2]] tf.math.count_nonzero(x, [0, 1]) # 3
Note: Strings are compared against zero-length empty string ""
. Any string with a size greater than zero is already considered as nonzero.
x = tf.constant(["", "a", " ", "b", ""]) tf.math.count_nonzero(x) # 3, with "a", " ", and "b" as nonzero strings.
Args | |
---|---|
input_tensor | The tensor to reduce. Should be of numeric type, bool , or string . |
axis | The dimensions to reduce. If None (the default), reduces all dimensions. Must be in the range [-rank(input_tensor), rank(input_tensor)) . |
keepdims | If true, retains reduced dimensions with length 1. |
dtype | The output dtype; defaults to tf.int64 . |
name | A name for the operation (optional). |
reduction_indices | The old (deprecated) name for axis. |
keep_dims | Deprecated alias for keepdims . |
input | Overrides input_tensor. For compatibility. |
Returns | |
---|---|
The reduced tensor (number of nonzero values). |
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Licensed under the Creative Commons Attribution License 3.0.
Code samples licensed under the Apache 2.0 License.
https://www.tensorflow.org/versions/r2.3/api_docs/python/tf/compat/v1/count_nonzero