pad_sequences: Pads sequences to the same length

In keras: R Interface to 'Keras'

Pads sequences to the same length

Description

Pads sequences to the same length

Usage

pad_sequences(
  sequences,
  maxlen = NULL,
  dtype = "int32",
  padding = "pre",
  truncating = "pre",
  value = 0
)

Arguments

sequences	List of lists where each element is a sequence
maxlen	int, maximum length of all sequences
dtype	type of the output sequences
padding	'pre' or 'post', pad either before or after each sequence.
truncating	'pre' or 'post', remove values from sequences larger than maxlen either in the beginning or in the end of the sequence
value	float, padding value

Details

This function transforms a list of num_samples sequences (lists of integers) into a matrix of shape ⁠(num_samples, num_timesteps)⁠. num_timesteps is either the maxlen argument if provided, or the length of the longest sequence otherwise.

Sequences that are shorter than num_timesteps are padded with value at the end.

Sequences longer than num_timesteps are truncated so that they fit the desired length. The position where padding or truncation happens is determined by the arguments padding and truncating, respectively.

Pre-padding is the default.

Value

Matrix with dimensions (number_of_sequences, maxlen)

See Also

Other text preprocessing: make_sampling_table(), skipgrams(), text_hashing_trick(), text_one_hot(), text_to_word_sequence()

keras documentation built on May 29, 2024, 3:20 a.m.