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index to matrix columns

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laplace laplace
laplace laplace 2013-6-20
i want put indices to matrix columns. eg
i got 1 2 3 3 4 5 6 7 8
i want to assign indices to the column vectors [1:3:6] etc
and is there a way to put random indices? the way crossvalind command does? the problem with crossvalind is that it only accepts arrays not column vectors
any ideas?

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回答（1 个）

the cyclist
the cyclist 2013-6-20
I think you can do what you want using the randsample() command.
doc randsample
for details.

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