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Re: How to map a list on function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg97516] Re: How to map a list on function
  • From: Szabolcs Horvát <szhorvat at gmail.com>
  • Date: Sat, 14 Mar 2009 18:12:53 -0500 (EST)
  • References: <gpg18t$ceh$1@smc.vnet.net>

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 ?

Try this:

Times @@ ({x, y, z, u}^#) & /@
    {{10, 3, 5, 7}, {4, 6, 8, 9}, {0, 8, 3, 6}}


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