Re: Randomly generate 10 different integers

[Dupuis]

Xin Dong wrote:
> 
> Hi,
> 
> I wanna randomly generate 10 different integers in a given range. I know I
> can use random function and discard duplicate values. But is there any
> other
> simple way to do it?
> 
> 

What you're searching for is an implementation of the Fisher-Yates
algortihm, see http://en.wikipedia.org/wiki/Fisher–Yates_shuffle

Here is a possible way:
x=(1:10); n = length(x);
while n >= 2,
 t = ceil(unifrnd(0, n)); %# returns 1 <= t <= n
 if (n != t), dummy = x(n); x(n) = x(t); x(t) = dummy; endif %# permute
 n = n - 1;
endwhile 
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