Re: Lists to mask other lists
- To: mathgroup at smc.vnet.net
- Subject: [mg19108] Re: Lists to mask other lists
- From: tobiasoed at my-deja.com
- Date: Thu, 5 Aug 1999 01:35:23 -0400
- Organization: Deja.com - Share what you know. Learn what you don't.
- References: <7o5hi2$rkt@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
In article <7o5hi2$rkt at smc.vnet.net>,
aram schiffman <aram at sirius.com> wrote:
> Howdy.
>
> I am trying to use one list to control the content of a second list.
> (It's not really masking, but...)
>
> Here's what I mean. Let's say
>
> maskList={1,0,0,1,1}
>
> realDealList={aaa,bbb,ccc,ddd,eee}
>
> (* could be filled with anything; same # elements as maskList }
>
> If a 1 appears at position n of maskList, then I leave the
corresponding
> element of realDealList alone. But if a 0 appears, then I want to
change
> the corresponding element of realDealList in some prescribed way.
Let's
> say I change those elements to my first name (aram). Then realDealList
> would become
>
> {aaa,aram,aram,ddd,eee}
>
> I can do this in a loop, which is a really clunky solution, but isn't
> there a way I can Map across my list somehow?
>
> Thanks,
> Aram Schiffman
>
MapThread[(If[#1===1,#2,aram])&,{maskList,realDealList}]
Tobias
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