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Initialize a matrix in mathematica

• To: mathgroup at smc.vnet.net
• Subject: [mg66742] Initialize a matrix in mathematica
• From: "ashesh" <ashesh.cb at gmail.com>
• Date: Sun, 28 May 2006 06:08:29 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

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.

• Follow-Ups:
  • Re: Initialize a matrix in mathematica
    • From: Murray Eisenberg <murray@math.umass.edu>