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Re: A Problem with x[i_]:=

  • To: mathgroup at smc.vnet.net
  • Subject: [mg82993] Re: A Problem with x[i_]:=
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Tue, 6 Nov 2007 03:44:26 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <fgmq4o$9tv$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de

Hi,

a) can you make postings that are syntacical correct or mean
    x=N[Total[-2Log[((n)(pdpd)/v[I])^v[i]]],10] realy I that is
    the complex unit Sqrt[-1]==I
    and your second input should be:
    x[i_] := N[Total[-2 Log[((n) (pdpd)/v[i])^v[i]]], 10]

b) Table[N[Total[-2 Log[((n) (pdpd)/v[i])^v[i]]], 10],{i,1,10000000}]
    will make a list with all you evaluated expressions and
    Table[x[i]=N[
               Total[-2 Log[((n) (pdpd)/v[i])^v[i]]],10],{i,1,10000000}]
    will store it in x[i] *and* in the ouput list ..

Regards
   Jens

John wrote:
> The assignment, x=N[Total[-2Log[((n)(pdpd)/v[I])^v[i]]],10], executes
> for i=1,2,..,10, and I can make a list of the 10 outcomes by repeating
> the assignment 10 times.
> 
> I thought that the assignment, x[i_]:=N{Total[-2Log[((n)(pdpd)/
> v[i])^v[i]]],10], would make a list of the 10 outcomes, without the
> necessity of manual repetitions, but Mathematica rejected it.
> 
> The error message tells me that my assignment won't execute because
> times is protected.
> 
> There must be some way to do what I want to do, but I can't figure it
> out.
> 
> I am using Mathematica 6.
> 
> John
> 
> 


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