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Re: how to display the value of w after using do?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg111007] Re: how to display the value of w after using do?
  • From: Patrick Scheibe <pscheibe at trm.uni-leipzig.de>
  • Date: Fri, 16 Jul 2010 06:59:20 -0400 (EDT)

Hi,

a Do Loop never returns anything as long as you don't use return. You
can find this information in the "MORE INFORMATION" section of the help
of Do.

However, the assignment of w[n][k] is done. Just check what ?w gives.

If you want to "see" the values of your assignment explicitely, you
could just use a Table:

n = 5;
Table[w[n][k] = 
  Exp[z0[n][k]^2] Sqrt[
    Pi] 2^(n - 1) n!/(n HermiteH[n - 1, z0[n][k]])^2, {k, n}]

Hope this helps,

Cheers
Patrick

On Fri, 2010-07-16 at 05:15 -0400, ynzhang at mech.uwa.edu.au wrote:
> 
> Dear Sir/Madam,
> 
> I am a beginner of Mathematica.
> I just wrote a Notebook(nb) in Mathematica to in order to obtain the  
> Gauss-Hermite weights as follows:
> 
> n = 5;
> Do[w[n][k] = Exp[z0[n][k]^2] Sqrt[Pi] 2^(n - 1)  n! /
> (n HermiteH[n - 1, z0[n][k]])^2, {k, n}];
> I press shift & Enter to Evalutate. The results come out with only
> 
>   In[1]:= Do[w[n][k] = Exp[z0[n][k]^2] Sqrt[Pi] 2^(n - 1)  n! /
>       (n HermiteH[n - 1, z0[n][k]])^2, {k, n}];
> 
> without Out[1].So I dont know if w comes out or not at last . If so,  
> there should be a row or column vector shown in Out[1].
> 
> 
> Thank you very much! I am looking forward to hearing from you soon!
> 
> Regards,
> Yanni
> 



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