MathGroup Archive 2001

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

Search the Archive

Re: Uniquely Subtracting Elements in a Flat List

  • To: mathgroup at smc.vnet.net
  • Subject: [mg29198] Re: [mg29182] Uniquely Subtracting Elements in a Flat List
  • From: BobHanlon at aol.com
  • Date: Sat, 2 Jun 2001 17:56:07 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

In a message dated 2001/6/2 6:03:00 AM, kd7cyb at mac.com writes:

>I need help taking a flat list, such as {a,b,c,d} and generating another
>list by successively subtracting a-b, b-c, c-d, so that the resulting
>list would be {a-b,b-c,c-d}.
>

l1 = {a,b,c,d};

Drop[l1,-1]-Rest[l1]

ListConvolve[{-1,1},l1]

Rest[RotateRight[l1]-l1]


Bob Hanlon
Chantilly, VA  USA


  • Prev by Date: multiplyin a symbol by 0
  • Next by Date: Re: Uniquely Subtracting Elements in a Flat List
  • Previous by thread: Re: Uniquely Subtracting Elements in a Flat List
  • Next by thread: Re: Uniquely Subtracting Elements in a Flat List