How to partition a 1D list according to specified lengths?

Asked Apr 04 '19 at 20:40

Active Apr 04 '19 at 20:40

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I have a 1D list list={1,2,3,4,5,6,7,8,9} and I would like to partition it according to some specified sizes sizes={2,1,2,4}, where each element in sizes is the number of elements to include in each sublist. The desired result will be result={{1,2},{3},{4,5},{6,7,8,9}}. What would be a simple way to do this with list manipulations?

asked Apr 04 '19 at 20:40

nanjun

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Look here, at Internal`PartitionRagged. – corey979 Apr 04 '19 at 20:48
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@corey979 this is also now in the "System`" context as TakeList – b3m2a1 Apr 04 '19 at 20:51
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But Internal`PartitionRagged is usually faster than TakeList... – Henrik Schumacher Apr 04 '19 at 20:56
@b3m2a1 Thank you. This is really a neat function. According to the documentation, it is new in 11.2. – nanjun Apr 04 '19 at 20:58

How to partition a 1D list according to specified lengths?

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