Re: Initialize a matrix in mathematica

*To*: mathgroup at smc.vnet.net*Subject*: [mg66752] Re: [mg66742] Initialize a matrix in mathematica*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Mon, 29 May 2006 06:05:21 -0400 (EDT)*Reply-to*: hanlonr at cox.net*Sender*: owner-wri-mathgroup at wolfram.com

ndiv=5; a=Table[0,{ndiv}]; For[i=1,i<=ndiv,i++,a[[i]]=i*i]; a {1,4,9,16,25} Here are some other ways: a=Table[i^2,{i,ndiv}] {1,4,9,16,25} a=Range[ndiv]^2 {1,4,9,16,25} Bob Hanlon ---- ashesh <ashesh.cb at gmail.com> wrote: > > Hi All, > > Have programmed in another system until now and am trying to shift to > Mathematica and facing some diffciulties > > I would like to create a matrix, say a[ndiv] and would like to > initilize all the value to i^2 (or any other value). The size of the > matrix is not fixed. > > The code I tried to use is: > > ndiv = 5; > a = {}; > For[i=1, i<=ndiv, i++, > a[[i]] = i*i; > ]; > a > > This is producing the following error: > partw: Part 1 of {} does not exist and so on. > > I understand that I am not creating a matrix of size 1*ndiv for the > data to be fed it. > > So I tried using Table as follows: > > a = Table[0,{1},{ndiv}] followed by the above For loop (when I wanted > to initialize the matrix with say i*i; > > Hope some one can help me in doing the above operation > > Regs. >