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Recognising parameters in function

• To: mathgroup at smc.vnet.net
• Subject: [mg94523] Recognising parameters in function
• From: "Stuart Nettleton" <Stuart.Nettleton at uts.edu.au>
• Date: Mon, 15 Dec 2008 07:47:38 -0500 (EST)
• Organization: University of Technology, Sydney

Hi, would someone be able to suggest why FindMinimum will recognise  
parameters in the following function but the backsubstitution will not.  
Thanks for any help, Stuart
Clear[f, vars1, z];
vars1 = {x, y};
z = (x - 5)^2 + (y - 3)^2;
f[vars_] := Module[{a},
     a = z/2;
     Return[a]
     ] /; VectorQ[vars, NumericQ];
optim = FindMinimum[Join[{f[vars1]}, Thread[vars1 >= 0]], vars1]
optim[[2]]
f[vars1] /. optim[[2]]

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• Follow-Ups:
  • Re: Recognising parameters in function
    • From: Patrick Scheibe <pscheibe@trm.uni-leipzig.de>