How i will choose a random element of a matrix

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I have a matrix A,and i want to choose randomly an element from the matrix.How i will do that?

Accepted Answer

per isakson
per isakson on 24 Mar 2015
One way
A = rand(3,4)
A( randi([1,size(A,1)],1), randi([1,size(A,2)],1) )
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More Answers (1)

Guillaume
Guillaume on 24 Mar 2015
It may be (insignificantly) faster to use linear indexing:
A(randi(numel(A)));
It's more succinct anyway, and works whatever the number of dimensions of the array.

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