comp.lang.idl-pvwave archive: archive » Re: increment an array subset based on another subset

Home » Public Forums » archive » Re: increment an array subset based on another subset

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: increment an array subset based on another subset [message #82416 is a reply to message #82415]

Tue, 11 December 2012 17:51

Jeremy Bailin
Messages: 618
Registered: April 2008

Senior Member

On 12/11/12 6:39 PM, havok2063@gmail.com wrote:
>
> I have a sorted list of ids and subsets they belong to:
>
> ids = [11, 21, 45, 50, 56, 416, 430]
>
> sub = [A, A, B, A, B, B, A]
>
> 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.
>
> I feel like the answer lies somewhere with where, total, or histogram, but the solution escapes me. Anyone have ideas?
>
> Thanks.
>

increment = total(sub eq B, /cumulative, /int) * (sub eq A)
ids += increment

-Jeremy.

Report message to a moderator

[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

Previous Topic:	Re: I have a problem!
Next Topic:	Re: Efficient sub array extraction

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 00:58:50 PDT 2025

Total time taken to generate the page: 1.67646 seconds