rand integer values from an array

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Salvatore Mazzarino
I have an array that contains some integer.
i.e
A=[1 5 7 9]
I would choose a rand value from this vector. Which could be the best way?

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Wayne King
Wayne King 2012-9-20
编辑：Wayne King 2012-9-20
You can use randi
index = randi(length(A(:)),1,1);
A(index)
for a 1-D vector, you can just do length(A), but length(A(:)) will work with a matrix as well.

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