Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2006
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2006

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Initialize a matrix in mathematica

  • To: mathgroup at smc.vnet.net
  • Subject: [mg66747] Re: Initialize a matrix in mathematica
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Mon, 29 May 2006 06:05:08 -0400 (EDT)
  • Organization: The Open University, Milton Keynes, UK
  • References: <e5bt2l$ba3$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

ashesh 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.
> 
What about the following?

In[1]:=
a = Table[n^2, {n, 1, 5}]

Out[1]=
{1, 4, 9, 16, 25}

HTH,
Jean-Marc


  • Prev by Date: RE:Initialize a matrix in mathematica
  • Next by Date: FilledListPlot with StackGraphics
  • Previous by thread: RE:Initialize a matrix in mathematica
  • Next by thread: Re: Initialize a matrix in mathematica