quatmod - Calculate modulus of quaternion

Syntax

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

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