Select some elements from a given matrix

2015 3 25
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Hello everyone, I have a matrix something like
m=[0.34,0.000009,0,2, 0,0.4,0.00087];
what i want is to pick randomly 3 elements from that matrix, i am really stuck , can anyone help?

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James Tursa
James Tursa 2015-3-25
编辑：James Tursa 2015-3-25

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Assuming you don't care about the order in which they are selected:
m(randperm(numel(m),3))
If you want to preserve the original ordering, then:
m(sort(randperm(numel(m),3)))

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