Quaternion Function Reference

logm

Matrix logarithm
(Quaternion overloading of standard MATLAB® function)

Syntax

X = logm(Y)

Description

logm(X) computes the matrix logarithm of a quaternion matrix. The algorithm used is based on calling the MATLAB® logm function on an adjoint matrix, and is therefore not accurate for larger matrices. It may also fail for some quaternion matrices. The accuracy may be checked using the expm function.

See Also

MATLAB® function: logm
QTFM functions: expm, adjoint, unadjoint

© 2008-2013 Stephen J. Sangwine and Nicolas Le Bihan

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