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MathGroup Archive 2005

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Re: filling in an array

  • To: mathgroup at
  • Subject: [mg55369] Re: filling in an array
  • From: David Bailey <dave at>
  • Date: Sun, 20 Mar 2005 04:12:07 -0500 (EST)
  • References: <d1guie$sc$>
  • Sender: owner-wri-mathgroup at

dumb_founded wrote:
> How can I input values into an array most efficiently?  I tried the
> code below, but it doesn't work.  The kernel starts working through the
> loop and never gets out.
> Array[b, 10];
> For[i = 1, i = 10, b[i] = i/10]


If a Mathematica command does not work as I expect, the first thing I do 
is click on the command name and press F1 to bring up the help 
information - which is very comprehensive. That would tell you that the 
syntax of the For command (in your context) is:

For[i = 1, i < 11, i++,b[[i]]=i/10]

Note that arrays are indexed using double square brackets, single ones 
are used for function arguments.

Rather than struggle like this, why not take a short course on 
Mathematica. People here can only correct the odd problems you present, 
and I think if you learned how to write good-quality Mathematica code 
you would never look back!

David Bailey

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