- drot:: N * X * Y * C * S [INCX * INCY] -> F64VECTOR * F64VECTOR procedure
xROT applies a plane rotation matrix to a sequence of ordered pairs: (x_i , y_i), for i = 1, 2, ..., n.
X and Y are vector of dimensions (N-1) * abs(incx) + 1 and (N-1) * abs(incy) + 1, respectively.
C and S are respectively the cosine and sine of the plane of rotation.