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Re: question about nest
*To*: mathgroup at christensen.cybernetics.net
*Subject*: [mg1942] Re: question about nest
*From*: Albright <albright at physics.ucla.edu>
*Date*: Wed, 23 Aug 1995 22:33:38 -0400
*Organization*: UCLA Department of Physics and Astronomy
ORLANDO LUIS GOULART PERES <orlando at axp.ift.unesp.br> wrote:
>Dear Wizards
>
>I have a function with two variables
>f[x_,a_]:=a*x*(1-x)
>And I need the n-compose function
>Nest[f,x,n]
>But Mathematica look for a function f[x] and not f[x,a]
>Is this possible to use Nest with this two variable function?
>For example, I need
>f[x,a], f[f[x,a],a], f[f[f[x,a],a],a] .
>Later I will put many values for "a" .
>Regards
>Orlando Peres
>
>
Hi.
You might try something like:
h[n_] := Nest[g,x,n] //. g[x_] -> f[x,a]
For example:
In[1]:= h[n_] := Nest[g,x,n] //. g[x_] -> f[x,a]
In[2]:= h[3]
Out[2]:= f[f[f[x,a],a],a]
Regards.
-Brian
Brian J. Albright
Department of Physics and Astronomy, UCLA
albright at physics.ucla.edu
http://bohm.physics.ucla.edu/~albright
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