Re: How to extract functions from a list and call them with any argument?
- To: mathgroup at smc.vnet.net
- Subject: [mg65927] Re: [mg65919] How to extract functions from a list and call them with any argument?
- From: "Carl K. Woll" <carlw at wolfram.com>
- Date: Mon, 24 Apr 2006 06:01:18 -0400 (EDT)
- References: <200604231017.GAA11838@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
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].
>
> Dom
Sounds like you want to convert the functions in the list to pure
functions. Here is a method to do so:
In[1]:= f3 = Function[{x}, #]&[ funclist[[3]] ]
Out[1]= Function[{x}, (Cos[x])^2]
Lets see if it works:
In[2]:= f3[3]
Out[2]= (Cos[3])^2
Carl Woll
Wolfram Research
- References:
- How to extract functions from a list and call them with any argument?
- From: dmp55@sympatico.ca
- How to extract functions from a list and call them with any argument?