Re: nth differences

*To*: mathgroup at smc.vnet.net*Subject*: [mg39872] Re: nth differences*From*: atelesforos at hotmail.com (Orestis Vantzos)*Date*: Sun, 9 Mar 2003 05:29:26 -0500 (EST)*References*: <b4c9lo$nqg$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

diff[lst_List]:=Drop[lst,1]-Drop[lst,-1] then Nest[diff, myList, {n}] to get the n-th difference of myList Orestis "Zachary Turner" <_NOzturnerSPAM_ at cyberonic.com> wrote in message news:<b4c9lo$nqg$1 at smc.vnet.net>... > Say I have a list of k integers and I want to produce a list containing the > first differences? For example, given {1, 2, 5, 7, 8, 9} the first > differences are {1, 3, 2, 1, 1}, and the second differences are {2, -1, -1, > 0}, the third are {-3, 0, 1}, etc