Aerospace Toolbox

quatmod - Calculate modulus of quaternion

Syntax

n = quatmod(q)

Description

n = quatmod(q) calculates the modulus, n, for a given quaternion, q. Input q is an m-by-4 matrix containing m quaternions. n returns a column vector of m moduli. Each element of q must be a real number. Additionally, q has its scalar number as the first column.

Examples

Determine the modulus of q = [1 0 0 0]:

mod = quatmod([1 0 0 0])


mod =

     1

See Also

quatconj, quatdivide, quatinv, quatmultiply, quatnorm, quatnormalize, quatrotate

quatinv

quatmultiply