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package org.nd4j.linalg.ops.transforms;

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;

/**
 *  Absolute value
 */
public class Abs 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) {
           return  ComplexUtil.abs((org.nd4j.linalg.api.complex.IComplexNumber) value);
       }
       return   Math.abs((double) value);
    }
}