Re: calculate de Jong function

*To*: mathgroup at smc.vnet.net*Subject*: [mg56985] Re: calculate de Jong function*From*: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>*Date*: Thu, 12 May 2005 02:32:18 -0400 (EDT)*Organization*: Uni Leipzig*References*: <d5skfb$nv0$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi, your vector is a list and the dimension of the vector is the length of the list f[x_]:=x.x does what you want. Regards Jens "Stefan Schuster" <bi1169*delete_from_star_to_star* at fh-weihenstephan.de> schrieb im Newsbeitrag news:d5skfb$nv0$1 at smc.vnet.net... > 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 >