Example usage for org.apache.commons.math3.linear RealVectorChangingVisitor RealVectorChangingVisitor

Introduction

In this page you can find the example usage for org.apache.commons.math3.linear RealVectorChangingVisitor RealVectorChangingVisitor.

Prototype

RealVectorChangingVisitor

Source Link

Usage

From source file:com.github.thorbenlindhauer.factor.CanonicalGaussianFactor.java

/**
 * mapping must have the size of the new vector; maps a vector to a new size by applying the mapping of the positions
 * and fills the remaining places with 0 values
 *//*from w  ww  .jav a2  s  .c  o m*/
protected static RealVector padVector(final RealVector vector, int newSize, final int[] mapping) {
    final RealVector newVector = new ArrayRealVector(newSize);

    newVector.walkInOptimizedOrder(new RealVectorChangingVisitor() {

        @Override
        public double visit(int index, double value) {
            if (mapping[index] >= 0) {
                return vector.getEntry(mapping[index]);
            } else {
                return 0;
            }
        }

        @Override
        public void start(int dimension, int start, int end) {
        }

        @Override
        public double end() {
            return 0;
        }
    });
    return newVector;
}

---