Compute dot (inner) products

dot_product1d(), dot_product2d(), and dot_product3d() compute the dot (inner) product of two coordinate vectors. You may also use the * operator and if R >= 4.3.0 you may also use the %*% operator to compute the dot (inner) product.

Usage

dot_product1d(x, y)

dot_product2d(x, y)

dot_product3d(x, y)

Arguments

x

A Coord1D, Coord2D, or Coord3D object.

y

A Coord1D, Coord2D, or Coord3D object.

Value

A numeric vector of dot products.

See also

cross_product3d() for the cross product of two Coord3D vectors.

Examples

p1 <- as_coord2d(x = c(1, 2), y = c(3, 4))
p2 <- as_coord2d(x = c(5, 6), y = c(7, 8))
dot_product2d(p1, p2)
#> [1] 26 44
p1 * p2 # equivalent
#> [1] 26 44
if (getRversion() >= "4.3.0") {
  p1 %*% p2
}
#> [1] 26 44