MathGroup Archive 2002

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

Search the Archive

Re: Solve and using the solutions further

  • To: mathgroup at smc.vnet.net
  • Subject: [mg38342] Re: Solve and using the solutions further
  • From: Rainer Gruber <rainer.gruber at gmx.at>
  • Date: Thu, 12 Dec 2002 01:36:50 -0500 (EST)
  • Organization: Johannes Kepler Universitaet Linz
  • References: <at4c5l$eno$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Angela Birk wrote:
> Hi,
> I am trying to solve 3 equations on 3 variables --- which is solveable.
> After that I want to use only the positive solutions of the three
> variables for further calculations. I tried to use the Select command in
> connection with the Solve command, but I get only an empty list.
> 
> [...]

Try

    Cases[sol, {(_ -> _?Positive) ..}]

where 'sol' is the result of Solve.

Rainer



  • Prev by Date: RES: Re: Levemberg
  • Next by Date: Export[] and AxesLabel->{"x/x0", y/y0, z} (there is no "/" in a .ps file)
  • Previous by thread: Solve and using the solutions further
  • Next by thread: Re: Solve and using the solutions further