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MathGroup Archive 2006

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Re: How to extract functions from a list and call them with any argument?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg65963] Re: How to extract functions from a list and call them with any argument?
  • From: José Carlos Santos <jcsantos at fc.up.pt>
  • Date: Mon, 24 Apr 2006 06:02:41 -0400 (EDT)
  • References: <e2fkto$bp7$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

On 23-04-2006 11:29, dmp55 at sympatico.ca wrote:

> I have a list of functions, i.e.,
> 
> funclist = {Sin[x], x^3, Cos[x]^2}.
> 
> I can extract each of the functions, like
> 
> In[1]:=funclist[[1]]
> Out[1]=Sin[x]
> 
> , but I don't know how to call these functions with a general argument.
> If I type
> 
> In[2]:=funclist[t][[1]]
> 
> , I get
> 
> Out[2]=t
> 
> instead of Sin[t] (or t^3 or Cos[t]^2)
> 
> What I would like is to extract a function from the list and to call it
> with any argument, as it was defined in a standard way:
> f[x_]:=Sin[x].

funclist[[1]]/.{x->t}

will give you Sin[t].

Best regards,

Jose Carlos Santos


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