org.nd4j.linalg.schedule.StepSchedule Maven / Gradle / Ivy
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* * This program and the accompanying materials are made available under the
* * terms of the Apache License, Version 2.0 which is available at
* * https://www.apache.org/licenses/LICENSE-2.0.
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* * See the NOTICE file distributed with this work for additional
* * information regarding copyright ownership.
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* * SPDX-License-Identifier: Apache-2.0
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package org.nd4j.linalg.schedule;
import lombok.Data;
import org.nd4j.shade.jackson.annotation.JsonProperty;
@Data
public class StepSchedule implements ISchedule {
private final ScheduleType scheduleType;
private final double initialValue;
private final double decayRate;
private final double step;
public StepSchedule(@JsonProperty("scheduleType") ScheduleType scheduleType,
@JsonProperty("initialValue") double initialValue,
@JsonProperty("decayRate") double decayRate,
@JsonProperty("step") double step){
this.scheduleType = scheduleType;
this.initialValue = initialValue;
this.decayRate = decayRate;
this.step = step;
}
@Override
public double valueAt(int iteration, int epoch) {
int i = (scheduleType == ScheduleType.ITERATION ? iteration : epoch);
return initialValue * Math.pow(decayRate, Math.floor(i / step));
}
@Override
public ISchedule clone() {
return new StepSchedule(scheduleType, initialValue, decayRate, step);
}
}