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/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://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.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
package org.nd4j.linalg.api.ops.impl.reduce3;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.imports.NoOpNameFoundException;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.BaseReduceFloatOp;
import org.nd4j.linalg.factory.Nd4j;
import java.util.Arrays;
import java.util.List;
/**
* Dot product.
*
* @author Adam Gibson
*/
public class Dot extends BaseReduce3Op {
public Dot(SameDiff sameDiff, SDVariable i_v, SDVariable i_v2, int... dimensions) {
super(sameDiff, i_v, i_v2, dimensions);
}
public Dot() {
}
/**
* Full array dot product reduction, optionally along specified dimensions.
* See wikipedia for details.
*
* @param x input variable.
* @param y input variable.
* @param z (optional) place holder for the result. Must have the expected shape.
* @param dimensions (optional) Dimensions to reduce over. If dimensions are not specified, full array reduction is performed.
* @see org.nd4j.linalg.ops.transforms.Transforms#dot Transforms.dot(...) for a wrapper around the common use case of 2 INDArrays.
*/
public Dot(INDArray x, INDArray y, INDArray z, int... dimensions) {
this(x, y, z, true, false, dimensions);
}
/**
* @see #Dot(INDArray x, INDArray y, INDArray z, int...)
*/
public Dot(INDArray x, INDArray y, int... dimensions) {
this(x, y, null, dimensions);
}
/**
* @see #Dot(INDArray x, INDArray y, INDArray z, int...)
*/
public Dot(INDArray x, INDArray y, INDArray z) {
this(x, y, z, null);
}
/**
* @see #Dot(INDArray x, INDArray y, INDArray z, int...)
*/
public Dot(INDArray x, INDArray y, INDArray z, boolean newFormat, boolean keepDims, int... dimensions) {
super(x, y, z, keepDims, false, dimensions);
}
@Override
public int opNum() {
return 3;
}
@Override
public String opName() {
return "dot";
}
@Override
public List doDiff(List f1) {
//TODO KEEP DIMS
return Arrays.asList(f().dotBp(arg(0), arg(1), f1.get(0), false, dimensions));
}
}