Dot product of two vectors
Usage
ddot(N = NULL, X, INCX = 1L, Y, INCY = 1L)
Arguments
- N
Optional integer giving the number of elements. Defaults to `length(X)`.
- X
Double-precision vector, matrix or [`bigmemory::big.matrix`] input.
- INCX
Integer stride for traversing `X`.
- Y
Double-precision object updated in place.
- INCY
Integer stride for traversing `Y`.
Value
Numeric scalar containing the dot product.
Examples
ddot(X = 1:3, Y = c(2, 4, 6))
#> [1] 28
