DES implementation in MATLAB faacing error in performing XOR operation

hello everyone can any one please help me out?

i am performing XOR operation in MATLAB for cryptography i am a student

XOR function that i need to call in MAIN DES :

function c=XOR(a,b)

c=num2str(a'~=b')

error i get is :

Error using ~=

Matrix dimensions must agree.

Error in XOR (line 2)

c=num2str(a'~=b')

please someone help me out. Thankyou

Answer 1

[Chris]

a and b apparently do not have the same number of characters. You can confirm this by displaying their sizes:

size(a)
size(b)

The sizes should be equal. If you want to pad a char vector with empty space, use concatenation.

a = [a, '  ']; %add two spaces to a row vector
b = [b; ['  ']']; %add two spaces to a column vector: transpose before concatenating