Re: Pattern Matching in Lists
- To: mathgroup at smc.vnet.net
- Subject: [mg35568] Re: Pattern Matching in Lists
- From: "Carl K. Woll" <carlw at u.washington.edu>
- Date: Fri, 19 Jul 2002 06:08:35 -0400 (EDT)
- Organization: University of Washington
- References: <ah5qce$59o$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi Anthony,
Here is one possibility:
Count[Partition[w,2,1],{1,0}]
Carl Woll
Physics Dept
U of Washington
"Anthony Mendes" <amendes at zeno.ucsd.edu> wrote in message
news:ah5qce$59o$1 at smc.vnet.net...
> Hello,
>
> Suppose w={1,1,1,0,0,1,0,1,0,0,1,0,0}.
>
> How can I count the number of occurrences of a 1 in w immediately
> followed by a 0 in w?
>
> I have tried every incarnation of Count[] I can think of; for example,
>
> Count[w,{___,1,0,___}]
>
> does not seem to work. In general, how can I count the number of
> occurrences of a 1 followed by a 0 in a list of 1's and 0's? Thank you!
>
>
> --
> Tony
> _____________________
> amendes at math.ucsd.edu
>
>