How to solve the error in this code??

x= {'d9' '31' '32' '25' 'f8' '84' '06' 'e5' 'a5' '59' '09' 'c5' 'af' 'f5' '26' '9a'};
y= {'fe' 'ff' 'e9' '92' '86' '65' '73' '1c' '6d' '6a' '8f' '94' '67' '30' '83' '08'};
X=hex2dec(x);
XX=dec2bin(X);
k=hex2dec(y);
u=aesinit(k);
w=aesencrypt(u,X);
U=dec2bin(w);
Xd = XX - '0';   % Convert CHAR '01' to DOUBLE [0, 1]
Ud =  U - '0';
Result = [Ud(:, 1:end-1), xor(Xd, Ud(:, end))]

The error in the above code is:

Error using xor
Matrix dimensions must agree.

Error in counter1 (line 35)
Result = [Ud(:, 1:end-1), xor(Xd, Ud(:, end))]

I would like to find the xor of the encrypted value U and plaintext X??

[Kaushik Lakshminarasimhan]

What is the dimension of Ud(:,end)? You can find this out by typing size(Ud(:,end)). It should be the same as size(Xd).

[Darsana P M]

aesinit(), it is actully a function for aes encryption.

[Darsana P M]

>> size(Xd)

ans =

    16     8
Size of(Xd)

Answer 1

[per isakson]

The error is caused by

xor( Xd, Ud(:,end) )

The R2017b doc on xor says

Input arrays, specified as scalars, vectors, matrices, or multidimensional arrays. 
Inputs A and B must either be the same size or have sizes that are compatible 
(for example, A is an M-by-N matrix and B is a scalar or 1-by-N row vector). For 
more information, see Compatible Array Sizes for Basic Operations.

Compatible Array Sizes for Basic Operations is rather new. There used to be scalar expansion and the function, bsxfun. Which release do you run?

Replacing the statement that causes the error by

xor( Xd, repmat(Ud(:,end),[1,size(Ud,2)]))

gives a result. However, I don't know whether it's the result you want.

[Darsana P M]

Thanks a lot. This solved the problem. The problem was with the error used in XOR operation.