/** returns the number of elements in the {@link Vector} that are neither 0 nor NaN */
public static int numberOfNoNZeroNonNaNElements(Vector vector) {
int elementsInVector = 0;
for (Element currentElement : vector.nonZeroes()) {
if (!Double.isNaN(currentElement.get())) {
elementsInVector++;
}
}
return elementsInVector;
}
static void denseVectorPlusAbsSparseVector(DenseVector denseVector, Vector sparseVector) {
Iterator<Vector.Element> nonZeroElements = sparseVector.nonZeroes().iterator();
while (nonZeroElements.hasNext()) {
Vector.Element e = nonZeroElements.next();
int index = e.index();
double v = e.get();
double prevV = denseVector.getQuick(index);
denseVector.setQuick(index, prevV + Math.abs(v));
}
}
