dasum daxpy dcopy ddot dnrm2 drot drotg drotm drotmg dscal dswap

ddot() double ddot ( int  n, double  x[], int  incx, double  y[], int  incy  ) xT * y (BLAS 1) Purpose This routine forms the dot product of two vectors. Returns Dot product of vectors x and y (x^T*y). Parameters [in] n Number of elements in vectors x and y. (If n <= 0, returns 0) [in] x[] Array x[lx] (lx >= 1 + (n - 1)*abs(incx)) Input vector x. [in] incx Storage spacing between elements of x. [in] y[] Array y[ly] (ly >= 1 + (n - 1)*abs(incy)) Input vector y. [in] incy Storage spacing between elements of y. Reference BLAS