Re: How to map a list on function

*To*: mathgroup at smc.vnet.net*Subject*: [mg97531] Re: How to map a list on function*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Sat, 14 Mar 2009 18:15:36 -0500 (EST)*References*: <gpg18t$ceh$1@smc.vnet.net>

Hi, lst = {{10, 3, 5, 7}, {4, 6, 8, 9}, {0, 8, 3, 6}} Plus @@ Times @@@ ( MapThread[Power, {{x, y, z, u}, #}] & /@ lst) ?? Regards Jens buts wrote: > Hello, > > Could anyone explain me how to do the following: > I have a long list of integer numbers in groups of four: > > list= {{10,3,5,7},{4,6,8,9},{0,8,3,6}, ...... } > > or its Flatten version. > > How to write a fast function g[list] which does this: > > g[list] =x^10*y^3*z^5*u^7 + x^4*y^6*z^8*u^9 + y^8*z^3*u^6+ ... > > It should be done many times (say, 10^4-6) on lists with length > 1000, so taking parts is not a good idea. > How to use Map or similar ? > Thanks. >