public static ZMatrixRMaj checkZeros(ZMatrixRMaj A, int numRows, int numCols)
{
if (A == null)
{
return(new ZMatrixRMaj(numRows, numCols));
}
else if (numRows != A.numRows || numCols != A.numCols)
{
throw new ArgumentException("Input is not " + numRows + " x " + numCols + " matrix");
}
else
{
A.zero();
}
return(A);
}