nn_utils_rnn_pad_sequence: Pad a list of variable length Tensors with 'padding_value'

Description Usage Arguments Details Value Note Examples

View source: R/nn-utils-rnn.R

Description

pad_sequence stacks a list of Tensors along a new dimension, and pads them to equal length. For example, if the input is list of sequences with size L x * and if batch_first is False, and T x B x * otherwise.

Usage

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nn_utils_rnn_pad_sequence(sequences, batch_first = FALSE, padding_value = 0)

Arguments

sequences

(list[Tensor]): list of variable length sequences.

batch_first

(bool, optional): output will be in B x T x * if TRUE, or in T x B x * otherwise

padding_value

(float, optional): value for padded elements. Default: 0.

Details

B is batch size. It is equal to the number of elements in sequences. T is length of the longest sequence. L is length of the sequence. * is any number of trailing dimensions, including none.

Value

Tensor of size T x B x * if batch_first is FALSE. Tensor of size B x T x * otherwise

Note

This function returns a Tensor of size T x B x * or B x T x * where T is the length of the longest sequence. This function assumes trailing dimensions and type of all the Tensors in sequences are same.

Examples

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if (torch_is_installed()) {
a <- torch_ones(25, 300)
b <- torch_ones(22, 300)
c <- torch_ones(15, 300)
nn_utils_rnn_pad_sequence(list(a, b, c))$size()

}

Example output



torch documentation built on Oct. 7, 2021, 9:22 a.m.