R: Compute external- or 'cross'- product of 3D vectors.

extprod3d {geometry} | R Documentation

## Compute external- or ‘cross’- product of 3D vectors.

### Description

Computes the external product

(x2 * y3 - x3 * y2, x3 * y1 - x1 * y3, x1 * y2 - x2 * y1)

(x2 * y3 - x3 * y2, x3 * y1 - x1 * y3, x1 * y2 - x2 * y1)

(x2 * y3 - x3 * y2, x3 * y1 - x1 * y3, x1 * y2 - x2 * y1)

of the 3D vectors in x and y.

### Usage

    extprod3d(x, y)

### Arguments

`x` | `n`-by-3 matrix. Each row is one x-vector
`y` | `n`-by-3 matrix. Each row is one y-vector

### Value

`n`-by-3 matrix

### Author(s)

Raoul Grasman

[Package geometry version 0.3-6 Index]