ess.m

来自「这是支持在MATLAB中进行四元数（哈密顿数）的工具箱」· M 代码 · 共 6 行

function x = ess(q)
% Extracts the scalar component of a full quaternion. If q is a pure
% quaternion, an error is raised, since the scalar part of a pure
% quaternion should not be extracted.

% Copyright