MathGroup Archive 2004

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Counting Runs


Hi,

v={1,1,1,-1,1,1,1,1,1,-1,-1,-1,-1,1}

Length /@ Split[Sort[First /@ Split[v]]]

gives you {2,3}

Regards

  Jens

"Gregory Lypny" <gregory.lypny at videotron.ca> schrieb im Newsbeitrag 
news:cmclmu$i99$1 at smc.vnet.net...
> Looking for an elegant way to count runs to numbers in a series.
> Suppose I have a list of ones and negative ones such as
> v={1,1,1,-1,1,1,1,1,1,-1,-1,-1,-1,1}.
> I'd like to create a function that counts the number of runs of 1s and
> -1s, which in this case is 3 and 2.
>
> Greg
> 



  • Prev by Date: Re: Counting Runs
  • Next by Date: Re: foreach loop
  • Previous by thread: Re: Counting Runs
  • Next by thread: Re: Counting Runs