Randomly select an element

Hello. I have an array: A=[4 8 7 9 5] How to I randomly select an element from the array? Thanks a lot.

Answer 1

[KL]

use randsample

https://www.mathworks.com/help/stats/randsample.html

 randsample(A,1)

[Vero Alin]

Thank you. I have just tried that but when i am running the code several times, I am getting only 9. Is it really random?

[KL]

Yes, it is. The documentation says so. You could test it like,

A=[4 8 7 9 5];
A_rand = zeros(1,15);
for k = 1:numel(A_rand)
    A_rand(1,k) = randsample(A,1);
end

now the result is,

A_rand =

       5     5     5     4     9     8     7     5     9     8     4     7     5     7     4

Another alternative is to create the index randomly but that's pretty much the same,

 A(randi([1 numel(A)],1)) or  A(randperm(numel(A),1))

[Vero Alin]

Alright. Thank you. Much appreciated.