#include <string_ops.h>
Return substrings from Tensor
of strings.
For each string in the input Tensor
, creates a substring starting at index pos
with a total length of len
.
If len
defines a substring that would extend beyond the length of the input string, then as many characters as possible are used.
If pos
is negative or specifies a character index larger than any of the input strings, then an InvalidArgumentError
is thrown.
pos
and len
must have the same shape, otherwise a ValueError
is thrown on Op creation.
NOTE: Substr
supports broadcasting up to two dimensions. More about broadcasting here
Examples
Using scalar pos
and len
:
``` input = [b'Hello', b'World'] position = 1 length = 3
output = [b'ell', b'orl'] ```
Using pos
and len
with same shape as input
:
``` input = [[b'ten', b'eleven', b'twelve'], [b'thirteen', b'fourteen', b'fifteen'], [b'sixteen', b'seventeen', b'eighteen']] position = [[1, 2, 3], [1, 2, 3], [1, 2, 3]] length = [[2, 3, 4], [4, 3, 2], [5, 5, 5]]
output = [[b'en', b'eve', b'lve'], [b'hirt', b'urt', b'te'], [b'ixtee', b'vente', b'hteen']] ```
Broadcasting pos
and len
onto input
:
``` input = [[b'ten', b'eleven', b'twelve'], [b'thirteen', b'fourteen', b'fifteen'], [b'sixteen', b'seventeen', b'eighteen'], [b'nineteen', b'twenty', b'twentyone']] position = [1, 2, 3] length = [1, 2, 3]
output = [[b'e', b'ev', b'lve'], [b'h', b'ur', b'tee'], [b'i', b've', b'hte'], [b'i', b'en', b'nty']] ```
Broadcasting input
onto pos
and len
:
``` input = b'thirteen' position = [1, 5, 7] length = [3, 2, 1]
output = [b'hir', b'ee', b'n"] ```
Arguments:
Returns:
Constructors and Destructors | |
---|---|
Substr(const ::tensorflow::Scope & scope, ::tensorflow::Input input, ::tensorflow::Input pos, ::tensorflow::Input len) |
Public attributes | |
---|---|
output |
Public functions | |
---|---|
node() const | ::tensorflow::Node * |
operator::tensorflow::Input() const | |
operator::tensorflow::Output() const |
::tensorflow::Output output
Substr( const ::tensorflow::Scope & scope, ::tensorflow::Input input, ::tensorflow::Input pos, ::tensorflow::Input len )
::tensorflow::Node * node() const
operator::tensorflow::Input() const
operator::tensorflow::Output() const
© 2017 The TensorFlow Authors. All rights reserved.
Licensed under the Creative Commons Attribution License 3.0.
Code samples licensed under the Apache 2.0 License.
https://www.tensorflow.org/api_docs/cc/class/tensorflow/ops/substr.html