Re: display of function

*To*: mathgroup at smc.vnet.net*Subject*: [mg58515] Re: display of function*From*: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>*Date*: Tue, 5 Jul 2005 04:52:23 -0400 (EDT)*Organization*: Uni Leipzig*References*: <dad7oo$t91$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi, u[y] /. n -> 3 /. Subscript -> Part ?? Regards Jens "Bosch, Darrell" <bosch at vt.edu> schrieb im Newsbeitrag news:dad7oo$t91$1 at smc.vnet.net... > > Dear Math Group: > > The first equation below shows a > function for u(y) which is > the sum of the products of pi times yi. In the > following steps, I > assign values of p and y. How can I get > Mathematica to display the > numerical value of u for the given p and y > values? When I insert the > u[y] command, I just get a repeat of the > equation I have entered. > Thanks for your suggestions. This group is a > great help. Darrell > > > > u[y_] := Sum[Subscript[p, i]*Subscript[y, i], > > {i, 1, n}] > > > > p = {.3,.4,.3} > > > > y={10000, 20000, 30000} > >