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Re: Do loop is faulty

  • To: mathgroup at
  • Subject: [mg55376] Re: Do loop is faulty
  • From: David Bailey <dave at>
  • Date: Mon, 21 Mar 2005 03:01:40 -0500 (EST)
  • References: <d1jfsj$sa4$>
  • Sender: owner-wri-mathgroup at

dumb_founded wrote:
> I define array a[i] and array b[i] of dimension 10.  Then I go through
> the following Do loop, or try to, that is.
> Array[c,10];
> Do[c[i]=NIntegrate[a[i]*x*Sin[b[i]*x],{x,0,b[i]}]
> I get numerous error messages saying that b[i] is not a valid limit of
> integration.
> This is sheer headache.  I will never try to use Mathematica for
> numerical analysis again.
> All your efforts on this matter are sincerely appreciated.
> Thanks

How about using the correct syntax - b[[i]] to obtain an element of your 

David Bailey

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