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Re: increment an array subset based on another subset [message #82405]

Wed, 12 December 2012 07:36

havok2063
Messages: 24
Registered: December 2012

Junior Member

On Tuesday, December 11, 2012 7:39:17 PM UTC-5, havo...@gmail.com wrote:
> I have a sorted list of ids and subsets they belong to:
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> ids = [11, 21, 45, 50, 56, 416, 430]
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> sub = [A, A, B, A, B, B, A]
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> I want to increment the ids of A based on the number of elements in subset B that lie in front of it. So for example , the 4th element will get incremented by 1 (50+1) since 1 element of B is in front. The last element will get incremented by 3 (430+3) since 3 elements of B lie in front of it. The first 2 elements of A don't get incremented.
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> I feel like the answer lies somewhere with where, total, or histogram, but the solution escapes me. Anyone have ideas?
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> Thanks.

Excellent. Thanks a lot.

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[Message index]

		Re: increment an array subset based on another subset By: havok2063 on Wed, 12 December 2012 07:36
		Re: increment an array subset based on another subset By: David Fanning on Tue, 11 December 2012 20:19
		Re: increment an array subset based on another subset By: Jeremy Bailin on Tue, 11 December 2012 17:51

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