public function update(array $gradient)
{
if (!$this->sumSquaredGradient) {
$this->sumSquaredGradient = array_fill(0, count($gradient), 0.0);
}
foreach ($gradient as $index => $slope) {
$this->sumSquaredGradient[$index] += pow($slope, 2);
}
}
public function testStep() { $schedule = new Adagrad(0.01, 1.0E-6); $schedule->update([1.0]); static::assertEquals(0.009999990000010001, $schedule->step(0)); }