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

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Douglas Anderson
Douglas Anderson 2013-12-12
评论： Douglas Anderson 2013-12-12
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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Sean de Wolski
Sean de Wolski 2013-12-12
n = 7;
v = [n:-2:1, 2:2:n]

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