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op {
graph_op_name: "InvertPermutation"
in_arg {
name: "x"
description: <<END
1-D.
END
}
out_arg {
name: "y"
description: <<END
1-D.
END
}
summary: "Computes the inverse permutation of a tensor."
description: <<END
This operation computes the inverse of an index permutation. It takes a 1-D
integer tensor `x`, which represents the indices of a zero-based array, and
swaps each value with its index position. In other words, for an output tensor
`y` and an input tensor `x`, this operation computes the following:
`y[x[i]] = i for i in [0, 1, ..., len(x) - 1]`
The values must include 0. There can be no duplicate values or negative values.
For example:
```
# tensor `x` is [3, 4, 0, 2, 1]
invert_permutation(x) ==> [2, 4, 3, 0, 1]
```
END
}
|
