repeat

  • namespace: Rindow\NeuralNetworks\Gradient\Func
  • classname: Repeat

Repeating elements in an array.

Methods

repeat

$g->repeat(
    NDArray $x,
    Variable|Scalar|int $repeats,
    ?int $axis=null,
    ?bool $keepdims=null,
) : Variable

Create and execute the function in the builder method

Arguments

  • x: The arguments are Variable or NDArray. Implicitly create Variable for NDArray.
  • repeats: Number of repetitions

Options

  • axis: Axis to reduce. If null, return the overall average. If it is negative, it is negative from the maximum dimension.
  • keepdims: If true, Repeat elements within an array without increasing its dimensions.
use Rindow\Math\Matrix\MatrixOperator;
use Rindow\NeuralNetworks\Builder\NeuralNetworks;
$mo = new MatrixOperator();
$nn = new NeuralNetworks($mo);
$g = $nn->gradient();
$x = $g->Variable([[1,2],[3,4]]);

$y = $nn->with($tape=$g->GradientTape(),function() use ($g,$x) {
    return $g->repeat($x,2,axis:-1,keepdims:true);
});
$dx = $tape->gradient($y,$x);
echo $mo->toString($y)."\n";
echo $mo->toString($da)."\n";

# [[1, 1, 2, 2],[3,3,4,4]]
# [[2,2],[2,2]]