IF statements to compare Imaginary Numbers

Question

Kayne 2011-8-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/14122-if-statements-to-compare-imaginary-numbers

Hi,

I have been trying to work out how to use a IF statement to see if two imarinary matrixs are the same, then display "results re correct' or soething like that. My code is below

EG,

clear
clc
%-------------------Setting Up the Variables-------------------------------
X = [1,    -1]'   ;       % The Orignal Funcation
X1 = [0, -1 - 1i]' ;    % The Recieved Function
% -------------------Potential transforms matries for W -------------------
W1 = 1/(sqrt(2))*[1,1;exp(0),-exp(0)]   ;           % Transform 1
W2 = 1/(sqrt(2))*[1,1;exp(1i*pi/4),-exp(1i*pi/4)] ;  % Transform 2
W3 = 1/(sqrt(2))*[1,1;exp(1i*pi/2),-exp(1i*pi/2)] ;  % Transform 3
W4 = 1/(sqrt(2))*[1,1;exp(3i*pi/4),-exp(3i*pi/4)];   % Transform 4
%-------------------Solving to find the Value for X1-----------------------
A = W1*X   ; % solves for Transform 1 and the orignal funcation
B = W2*X   ; % solves for Transform 2 and the orignal funcation
C = W3*X  ; % solves for Transform 3 and the orignal funcation
D = W4*X  ;% solves for Transform 4 and the orignal funcation

Now the if statements that I have been working on are as follows

if A==X1
disp ('Resutls are the same')
elseif B==X1
disp ('Resutls are the same')
elseif C==X1
disp ('Resutls are the same')
elseif D==X1
disp ('Resutls are the same')
end

Now I know that the answer is D but continue to get nothing for the result. I have read about this and it has something to do with floating point numbers and what Matlabs can display. I am a little lost as to how the code should look so that the answer D will display something saying it is the same.

Any help would be appriciated

Thanks Kayne