MATLAB: How to randomly interchange values in different rows in a matrix

swap

Hello,
I have a matrix, say A = [1 2 3 4 5;6 7 8 9 10]. I would like to randomly pick a cutpopint for each row and then swap the elements. Here is my script:
for row = 1:size(A,1)
    cutpoint = randsample(size(A,2),1);
    B(row,:) = A(row, [cutpoint:end 1:cutpoint-1]);
end
I was wondering if there is a neat way to skip to the loop, because my matrix is huge and I have to repeat the cut-and-swap procedure on the matrix 1000 times. This is really time consuming.
Any help is much appreciated.
Best,
Shen-Mou

Best Answer

[m,n] = size(A);
shuffle=mod( randi([0,n-1],m,1)+(0:n-1) , n   )*m +(1:m).',
B=A(shuffle),
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