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package com.yahoo.tensor.functions;
import com.google.common.annotations.Beta;
import com.google.common.collect.ImmutableList;
import java.util.List;
/**
* @author bratseth
*/
@Beta
public class XwPlusB extends CompositeTensorFunction {
private final TensorFunction x, w, b;
private final String dimension;
public XwPlusB(TensorFunction x, TensorFunction w, TensorFunction b, String dimension) {
this.x = x;
this.w = w;
this.b = b;
this.dimension = dimension;
}
@Override
public List<TensorFunction> functionArguments() { return ImmutableList.of(x, w, b); }
@Override
public TensorFunction replaceArguments(List<TensorFunction> arguments) {
if ( arguments.size() != 3)
throw new IllegalArgumentException("XwPlusB must have 3 arguments, got " + arguments.size());
return new XwPlusB(arguments.get(0), arguments.get(1), arguments.get(2), dimension);
}
@Override
public PrimitiveTensorFunction toPrimitive() {
TensorFunction primitiveX = x.toPrimitive();
TensorFunction primitiveW = w.toPrimitive();
TensorFunction primitiveB = b.toPrimitive();
return new Join(new Reduce(new Join(primitiveX, primitiveW, ScalarFunctions.multiply()),
Reduce.Aggregator.sum,
dimension),
primitiveB,
ScalarFunctions.add());
}
@Override
public String toString(ToStringContext context) {
return "xw_plus_b(" + x.toString(context) + ", " +
w.toString(context) + ", " +
b.toString(context) + ", " +
dimension + ")";
}
}
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