/*
 *
 * * Copyright 2015 Skymind,Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use
 * this file except in compliance with the License. * You may obtain a copy of the License at * *
 * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software *
 * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. * See the License for the specific language governing permissions and * limitations under
 * the License.
 *
 *
 */

package org.nd4j.linalg.api.ops.impl.transforms.arithmetic;

import org.nd4j.linalg.api.complex.IComplexNumber;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.BaseTransformOp;
import org.nd4j.linalg.api.ops.Op;

/**
 * atan2 operation
 *
 * @author raver119@gmail.com
 */
public class Atan2Op extends BaseTransformOp {
    public Atan2Op() {}

    public Atan2Op(INDArray x, INDArray y, INDArray z, long n) {
        super(x, y, z, n);
    }

    public Atan2Op(INDArray x, INDArray y) {
        super(x, y, x, x.lengthLong());
    }

    public Atan2Op(INDArray x, INDArray y, INDArray z) {
        super(x, y, z, x.lengthLong());
    }

    @Override
    public int opNum() {
        return 69;
    }

    @Override
    public String name() {
        return "atan2";
    }

    @Override
    public IComplexNumber op(IComplexNumber origin, double other) {
        throw new UnsupportedOperationException();
    }

    @Override
    public IComplexNumber op(IComplexNumber origin, float other) {
        throw new UnsupportedOperationException();
    }

    @Override
    public IComplexNumber op(IComplexNumber origin, IComplexNumber other) {
        throw new UnsupportedOperationException();
    }

    @Override
    public float op(float origin, float other) {
        return (float) Math.atan2(origin, other);
    }

    @Override
    public double op(double origin, double other) {
        return Math.atan2(origin, other);
    }

    @Override
    public double op(double origin) {
        return origin;
    }

    @Override
    public float op(float origin) {
        return origin;
    }

    @Override
    public IComplexNumber op(IComplexNumber origin) {
        return origin;
    }


    @Override
    public Op opForDimension(int index, int dimension) {
        INDArray xAlongDimension = x.vectorAlongDimension(index, dimension);

        return new Atan2Op(xAlongDimension, y.vectorAlongDimension(index, dimension), z.vectorAlongDimension(index, dimension), xAlongDimension.length());
    }

    @Override
    public Op opForDimension(int index, int... dimension) {
        INDArray xAlongDimension = x.tensorAlongDimension(index, dimension);


        return new Atan2Op(xAlongDimension, y.tensorAlongDimension(index, dimension), z.tensorAlongDimension(index, dimension), xAlongDimension.length());
    }


    @Override
    public void init(INDArray x, INDArray y, INDArray z, long n) {
        super.init(x, y, z, n);
        if (y == null)
            throw new IllegalArgumentException("No components for atan2");
    }
}

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Fix messed up file header & armor against future mishaps