How to Shuffle some arrays of a matrix? (permutataion matrix considered)

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alexaa1989
alexaa1989 on 12 Aug 2014
Commented: omar A.alghafoor on 10 Oct 2020
for shuffling I have this codes so far
nVar=length(x);
cc=randsample(nVar,2);
c1=min(cc)
c2=max(cc)
now I need to shuffle arrays between C1 and C2 without having a number twice. each number has to appear only once
  2 Comments
Adam
Adam on 12 Aug 2014
What do you expect to happen to the data outside of the C1 to C2 range? Are the arrays in question ordered so that data between C1 and C2 will always be contiguous and everything else in the array stays where it is?
The 'unique' function will get rid of duplicates for you.
alexaa1989
alexaa1989 on 12 Aug 2014
I need arrays between c1 and c2 shuffle randomly and appear once and everything outside C1:C2 stays the same as before

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Accepted Answer

Andrei Bobrov
Andrei Bobrov on 12 Aug 2014
n = numel(x);
c = sort(randsample(nVar,2));
r = c(1)+1:c(2)-1;
z = x(r);
x(r) = z(randperm(diff(c)-1));

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