org.nd4j.linalg.schedule.ExponentialSchedule Maven / Gradle / Ivy
package org.nd4j.linalg.schedule;
import lombok.Data;
import org.nd4j.shade.jackson.annotation.JsonProperty;
/**
* An exponential schedule, with 2 parameters: initial value, and gamma.
* value(i) = initialValue * gamma^i
* where i is the iteration or epoch (depending on the setting)
*
* @author Alex Black
*/
@Data
public class ExponentialSchedule implements ISchedule {
private final ScheduleType scheduleType;
private final double initialValue;
private final double gamma;
public ExponentialSchedule(@JsonProperty("scheduleType") ScheduleType scheduleType,
@JsonProperty("initialValue") double initialValue,
@JsonProperty("gamma") double gamma){
this.scheduleType = scheduleType;
this.initialValue = initialValue;
this.gamma = gamma;
}
@Override
public double valueAt(int iteration, int epoch) {
int i = (scheduleType == ScheduleType.ITERATION ? iteration : epoch);
return initialValue * Math.pow(gamma, i);
}
@Override
public ISchedule clone() {
return new ExponentialSchedule(scheduleType, initialValue, gamma);
}
}