qdft.m

这是支持在MATLAB中进行四元数（哈密顿数）的工具箱

function Y = qdft(X, A, L)
% QDFT Discrete quaternion Fourier transform.
%
% This function computes the one-dimensional discrete quaternion Fourier
% transform of X, which may be a real or complex quaternion array. If X
% is a vector the result is a vector of the same orientation. If X is a
% matrix, the transform is applied to columns of X. (Cf the Matlab dft
% function.)
%
% A is the transform axis and it may be a real or complex pure
% quaternion. It need not be a unit pure quaternion. L may take the values
% 'L' or 'R' according to whether the hypercomplex exponential is to be
% multiplied on the left or right of X. There are no default values.
%
% This function uses direct evaluation using a matrix product, and it is
% intended mainly for verifying results against fast transform
% implementations such as qfft.m. See also: iqdft.m.

% Copyright