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MathGroup Archive 2005

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Re: lists of variables

  • To: mathgroup at smc.vnet.net
  • Subject: [mg58161] Re: [mg58156] lists of variables
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Tue, 21 Jun 2005 06:02:34 -0400 (EDT)
  • Reply-to: hanlonr at cox.net
  • Sender: owner-wri-mathgroup at wolfram.com

var[x_String, n_Integer?Positive] := 
    ToExpression[Table[x<>ToString[k],{k,n}]];

f[x_,y_,z_] := Cos[x+y-z];

f@@var["t",3]

Cos[t1 + t2 - t3]


Bob Hanlon

> 
> From: Heath Gerhardt <heathgerhardt at hotmail.com>
To: mathgroup at smc.vnet.net
> Date: 2005/06/20 Mon AM 05:21:33 EDT
> Subject: [mg58161] [mg58156]  lists of variables
> 
> I need to make lists of variables, for example
> 
> {t1,t2,t3}
> 
> but have not been able to figure out how to make Mathematica do this. 
> Tried using
> 
> Array[t,3]
> 
> which gives
> 
> {t[1],t[2],t[3]}
> 
> but then I don't know how to set the t[i]'s in expressions similar to
> 
> F[t[1]_,t[2]_,t[3]_]:=Cos[t[1]+t[2]-t[3]]
> 
> thanks in advance
> Heath
> 
> 


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