Shuffling data inside a matrix

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C

MatLab

I have a matrix called drt which is 1x200 which contains only integer values and I want to shuffle these values inside the matrix. please how do I go about it ,I tried randperm and randsample but they are not working.

Answers in C or Matlab is welcomed.Thanks

What I have tried:

%create an array and fill it with numbers from 1 to fsum
fsum=200;
randm=zeros(1,fsum);
for rn=1:+1:fsum
randm(1,rn)=rn;
end
% to shuffle the array
randm=randm(randperm(length(randm)));

OR

randm=randsample(randm,fsum);