Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2005
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2005

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: display of function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg58522] Re: display of function
  • From: Peter Pein <petsie at dordos.net>
  • Date: Tue, 5 Jul 2005 06:34:14 -0400 (EDT)
  • References: <dad7oo$t91$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Bosch, Darrell schrieb:
> 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}
> 
> 
Hi,

just guessing:

 * you want Part[], not Subscript
 * you mean Length[p] (or Length[y]), not n
 * you expect the dot-product {.3,.4,.3).{10000, 20000, 30000}

Am I right?

-- 
Peter Pein
Berlin
http://people.freenet.de/Peter_Berlin/


  • Prev by Date: Re: Re: Re: Re: Can't assign value to symbols
  • Next by Date: Re: display of function
  • Previous by thread: Re: display of function
  • Next by thread: Re: display of function