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Re: calculate de Jong function

• To: mathgroup at smc.vnet.net
• Subject: [mg56990] Re: calculate de Jong function
• From: dh <dh at metrohm.ch>
• Date: Thu, 12 May 2005 02:32:25 -0400 (EDT)
• References: <d5skfb$nv0$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Hi Stefan,
there is the Length function that gives you the length of e.g. a vector, 
that is the dimension of your x.
In version 5.1 there is the function Norm that can make your life still 
easier.
Sincerely, Daniel

Stefan Schuster wrote:
> Hello,
> 
> I don't know how I should implement the first de jong function:
> 
> f(x)=Sum((x_i)^2)
> where x is a Vector with n dimensions and x_i is the value of the i-th 
> Dimension.
> i.e. all Values of the Vector are squared and added.
> 
> My problem is that I don't know how many Dimensions there are, so I 
> can't define the borders of the SUM function.
> 
> thanks in advance for help
> 
> Stefan
>