Is there an elegant way to do a "flip-flop" sort from the middle or near the middle?

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Douglas Anderson 2013-12-12

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评论： Douglas Anderson 2013-12-12

采纳的回答： Sean de Wolski

Hi!

I have a sequence like 1 2 3 4 5 6 7 (it may be any number, odd or even).

I would like to sort it so that it starts with the 4 position, and goes up on either side in a "flip flop" manner: 6 4 2 1 3 5 7, or flipping it the other way 7 5 3 1 2 4 6.

Is there a "nice" way to do this? I just need to specify the starting position, and then generate the order.

Thanks!

Doug

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Douglas Anderson 2013-12-12

Just to clarify -- I say "starts with the 4" position, but it can be any position, obviously not either 1 or 7! THAT I can do!

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Sean de Wolski 2013-12-12

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在 MATLAB Online 中打开

n = 7;
v = [n:-2:1, 2:2:n]

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Douglas Anderson 2013-12-12

Very nice! Thank you!

Douglas Anderson 2013-12-12

在 MATLAB Online 中打开

Although that doesn't work for even numbers:

v = [n:-2:1,1:2:n-1]

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