R: Scalar Product

Dot {DescTools} | R Documentation

## Scalar Product

### Description

'dot' or 'scalar' product of vectors or pairwise columns of matrices.

### Usage

      Dot(x, y)

### Arguments

`x` | numeric vector or matrix
`y` | numeric vector or matrix

### Details

Returns the 'dot' or 'scalar' product of vectors or columns of matrices. Two vectors must be of same length, two matrices must be of the same size. If `x` and `y` are column or row vectors, their dot product will be computed as if they were simple vectors.

### Value

A scalar or vector of length the number of columns of `x` and `y`.

### Author(s)

Hans W. Borchers <hwborchers@googlemail.com>

### See Also

`Cross`

### Examples

    Dot(1:5, 1:5)  #=> 55
    # Length of space diagonal in 3-dim- cube:
    sqrt(Dot(c(1,1,1), c(1,1,1)))  #=> 1.732051

[Package DescTools version 0.99.26 Index]