org.nd4j.linalg.ops.transforms.Tanh Maven / Gradle / Ivy
package org.nd4j.linalg.ops.transforms;
import org.apache.commons.math3.util.FastMath;
import org.nd4j.linalg.api.complex.IComplexNumber;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.ops.BaseElementWiseOp;
import org.nd4j.linalg.util.ComplexUtil;
/**
* Tanh transform
* @author Adam Gibson
*/
public class Tanh extends BaseElementWiseOp {
/**
* The transformation for a given value (a scalar ndarray)
*
* @param value the value to applyTransformToOrigin (a scalar ndarray)
* @param i the index of the element being acted upon
* @return the transformed value based on the input
*/
@Override
public Object apply(INDArray from,Object value, int i) {
if(value instanceof IComplexNumber) {
IComplexNumber element = (IComplexNumber) value;
return ComplexUtil.tanh(element);
}
else {
double d = (double) value;
return FastMath.tanh(d);
}
}
}