NonZero

Versioned name: NonZero-3

Category: Condition operation

Short description: NonZero returns the indices of the non-zero elements of the input tensor.

Detailed description: NonZero returns the indices of the non-zero elements of the input tensor (in row-major order - by dimension). The output tensor has shape [rank(input), num_non_zero]. For example, for the tensor [[1, 0], [1, 1]] the output will be [[0, 1, 1], [0, 0, 1]].

Attributes

• output_type
  • Description: the output tensor type
  • Range of values: "i64" or "i32"
  • Type: string
  • Default value: "i64"
  • Required: No

Inputs:

• 1: data tensor of arbitrary rank of type T. Required.

Outputs:

• 1: tensor with indices of non-zero elements of shape [rank(data), num_non_zero] of type T_IND.

Types

• T: any numeric type.
• T_IND: int64 or int32.

Example

<layer ... type="NonZero">
    <data output_type="i64"/>
    <input>
        <port id="0">
            <dim>3</dim>
            <dim>10</dim>
            <dim>100</dim>
            <dim>200</dim>
        </port>
     </input>
    <output>
        <port id="1">
            <dim>4</dim>
            <dim>600000</dim>
        </port>
    </output>
</layer>