# tf.raw_ops.UniqueWithCountsV2

Finds unique elements along an axis of a tensor.

This operation either returns a tensor `y` containing unique elements along the `axis` of a tensor. The returned unique elements is sorted in the same order as they occur along `axis` in `x`. This operation also returns a tensor `idx` and a tensor `count` that are the same size as the number of the elements in `x` along the `axis` dimension. The `idx` contains the index in the unique output `y` and the `count` contains the count in the unique output `y`. In other words, for an `1-D` tensor `x` with `axis = None:

`y[idx[i]] = x[i] for i in [0, 1,...,rank(x) - 1]`

#### For example:

``````x = tf.constant([1, 1, 2, 4, 4, 4, 7, 8, 8])
y, idx, count = UniqueWithCountsV2(x, axis = [0])
y ==> [1, 2, 4, 7, 8]
idx ==> [0, 0, 1, 2, 2, 2, 3, 4, 4]
count ==> [2, 1, 3, 1, 2]
``````

For a `2-D` tensor `x` with `axis = 0`:

``````x = tf.constant([[1, 0, 0],
[1, 0, 0],
[2, 0, 0]])
y, idx, count = UniqueWithCountsV2(x, axis=[0])
y ==> [[1, 0, 0],
[2, 0, 0]]
idx ==> [0, 0, 1]
count ==> [2, 1]
``````

For a `2-D` tensor `x` with `axis = 1`:

``````x = tf.constant([[1, 0, 0],
[1, 0, 0],
[2, 0, 0]])
y, idx, count = UniqueWithCountsV2(x, axis=[1])
y ==> [[1, 0],
[1, 0],
[2, 0]]
idx ==> [0, 1, 1]
count ==> [1, 2]
``````

`x` A `Tensor`. A `Tensor`.
`axis` A `Tensor`. Must be one of the following types: `int32`, `int64`. A `Tensor` of type `int32` (default: None). The axis of the Tensor to find the unique elements.
`out_idx` An optional `tf.DType` from: `tf.int32, tf.int64`. Defaults to `tf.int32`.
`name` A name for the operation (optional).

A tuple of `Tensor` objects (y, idx, count).
`y` A `Tensor`. Has the same type as `x`.
`idx` A `Tensor` of type `out_idx`.
`count` A `Tensor` of type `out_idx`.

[{ "type": "thumb-down", "id": "missingTheInformationINeed", "label":"必要な情報がない" },{ "type": "thumb-down", "id": "tooComplicatedTooManySteps", "label":"複雑すぎる / 手順が多すぎる" },{ "type": "thumb-down", "id": "outOfDate", "label":"最新ではない" },{ "type": "thumb-down", "id": "samplesCodeIssue", "label":"Samples / code issue" },{ "type": "thumb-down", "id": "otherDown", "label":"その他" }]
[{ "type": "thumb-up", "id": "easyToUnderstand", "label":"わかりやすい" },{ "type": "thumb-up", "id": "solvedMyProblem", "label":"問題の解決に役立った" },{ "type": "thumb-up", "id": "otherUp", "label":"その他" }]