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MathGroup Archive 2008

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Re: Problem NSolve

  • To: mathgroup at smc.vnet.net
  • Subject: [mg90656] Re: Problem NSolve
  • From: Narasimham <mathma18 at hotmail.com>
  • Date: Fri, 18 Jul 2008 04:00:57 -0400 (EDT)
  • References: <g5n45f$sb8$1@smc.vnet.net>

On Jul 17, 2:42 pm, Jorge <jorgecerri... at gmail.com> wrote:
> Hello! To begin to ask for excuses you for my English poor level... I am a Spanish student of Chemical Engineering. Now I am employed at the simulation of a series of chemical reactions with Mathematica.
>
> As soon as I have programmed the problem to resolving, 23 equations with 23 variables, I use the function Nsolve, but the program returns to me the following message of mistake
>
> General::ivar: 0 is not a valid variable. >>
>
> I have programmed my problem of the following form:
>
> ecu{lhs1==0,lhs2=0,...,lhs23}
> sol=Nsolve[ecu{var1,var2,...,var23}]
>
> Might someone help?
>
> Thank you very much!
> Jorge

Start with 2 equations and 2 variables, gradually increase the number
of variables to trap the error.


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