org.nd4j.linalg.api.ops.impl.shape.Linspace Maven / Gradle / Ivy
package org.nd4j.linalg.api.ops.impl.shape;
import org.nd4j.autodiff.samediff.SDVariable;
import org.nd4j.autodiff.samediff.SameDiff;
import org.nd4j.imports.NoOpNameFoundException;
import org.nd4j.imports.graphmapper.tf.TFGraphMapper;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.api.ops.DynamicCustomOp;
import org.nd4j.linalg.api.shape.LongShapeDescriptor;
import org.tensorflow.framework.AttrValue;
import org.tensorflow.framework.GraphDef;
import org.tensorflow.framework.NodeDef;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
/**
* Linspace op - with dynamic (SDVariable) args
* @author Alex Black
*/
public class Linspace extends DynamicCustomOp {
private DataType dataType;
public Linspace(SameDiff sameDiff, SDVariable from, SDVariable to, SDVariable length, DataType dataType){
super(sameDiff, new SDVariable[]{from, to, length});
this.dataType = dataType;
}
public Linspace(){ }
@Override
public String opName(){
return "lin_space";
}
@Override
public int getNumOutputs(){
return 1;
}
@Override
public List calculateOutputDataTypes(List inputDataTypes){
return Collections.singletonList(dataType);
}
@Override
public String onnxName() {
throw new NoOpNameFoundException("No onnx op opName found for " + opName());
}
@Override
public String tensorflowName() {
return "LinSpace";
}
@Override
public void initFromTensorFlow(NodeDef nodeDef, SameDiff initWith, Map attributesForNode, GraphDef graph) {
dataType = TFGraphMapper.convertType(attributesForNode.get("T").getType());
}
@Override
public List doDiff(List gradients){
return Arrays.asList(f().zerosLike(arg(0)), f().zerosLike(arg(1)), f().zerosLike(arg(2)));
}
@Override
public List calculateOutputShape(){
INDArray l = arg(2).getArr();
if(l == null)
return Collections.emptyList();
return Collections.singletonList(LongShapeDescriptor.fromShape(new long[]{l.getLong(0)}, dataType));
}
}