[R] Is it possible to recursively update a function?

[Seeker]

Thanks for your suggestion, Carl. Actually I am looking for a series
of functions like these

exp(-x)*.5^x
exp(-x)*.5^x*(1-.4^x)
exp(-x)*.5^x*(1-.4^x)*(1-.3^x)
where(.5,.4,.3...) are from the coming results.

I am not sure how to construct such an irregular fucntion vector.

On Mar 4, 6:40 pm, Carl Witthoft <c... at witthoft.com> wrote:
> My foolish move for this week: I'm going to go way out on a limb and
> guess what the OP wanted was something like this.
>
> i=1, foo = x*exp(-x)
>
> i=2, foo= x^2*exp(-x)
> i=3, foo = x^3*exp(-x)
> .
> .
> .
>
> In which case he really should create a vector bar<-rep(na,5) ,
> and then inside the loop,
>
> bar[i]<-x^i*foo(x)
>
> Carl
>
> quoted material:
> Date: Thu, 04 Mar 2010 11:37:23 -0800 (PST)
>
> I need to update posterior dist function upon the coming results and
> find the posterior mean each time.
>
> On Mar 4, 1:31 pm, jim holtman <jholt..._at_gmail.com> wrote:
>  > What exactly are you trying to do?  'foo' calls 'foo' calls 'foo' ....
>  >  How did you expect it to stop the recursive calls?
>  >
>  >
>  >
>  >
>  >
>  > On Thu, Mar 4, 2010 at 2:08 PM, Seeker <zhongm..._at_gmail.com> wrote:
>  > > Here is the test code.
>  >
>  > > foo<-function(x) exp(-x)
>  > > for (i in 1:5)
>  > > {
>  > > foo<-function(x) foo(x)*x
>  > > foo(2)
>  > > }
>
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