org.nd4j.linalg.api.ops.random.impl.BinomialDistributionEx Maven / Gradle / Ivy
package org.nd4j.linalg.api.ops.random.impl;
import lombok.NonNull;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.random.BaseRandomOp;
/**
* This Op generates binomial distribution
*
* @author [email protected]
*/
public class BinomialDistributionEx extends BaseRandomOp {
private int trials;
private double probability;
public BinomialDistributionEx() {
super();
}
/**
* This op fills Z with binomial distribution over given trials with single given probability for all trials
* @param z
* @param trials
* @param probability
*/
public BinomialDistributionEx(@NonNull INDArray z, int trials, double probability) {
init(z, z, z, z.lengthLong());
this.trials = trials;
this.probability = probability;
this.extraArgs = new Object[] {(double) this.trials, this.probability};
}
/**
* This op fills Z with binomial distribution over given trials with probability for each trial given as probabilities INDArray
* @param z
* @param trials
* @param probabilities array with probability value for each trial
*/
public BinomialDistributionEx(@NonNull INDArray z, int trials, @NonNull INDArray probabilities) {
if (z.lengthLong() != probabilities.lengthLong())
throw new IllegalStateException("Length of probabilities array should match length of target array");
if (probabilities.elementWiseStride() < 1)
throw new IllegalStateException("Probabilities array shouldn't have negative elementWiseStride");
init(z, probabilities, z, z.lengthLong());
this.trials = trials;
this.probability = 0.0;
this.extraArgs = new Object[] {(double) this.trials, this.probability};
}
/**
* This op fills Z with binomial distribution over given trials with probability for each trial given as probabilities INDArray
*
* @param z
* @param probabilities
*/
public BinomialDistributionEx(@NonNull INDArray z, @NonNull INDArray probabilities) {
this(z, probabilities.length(), probabilities);
}
@Override
public int opNum() {
return 9;
}
@Override
public String name() {
return "distribution_binomial_ex";
}
@Override
public boolean isExecSpecial() {
return true;
}
}