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MathGroup Archive 1995

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Re: question about nest

  • To: mathgroup at christensen.cybernetics.net
  • Subject: [mg1955] Re: question about nest
  • From: Sigurd.Schelstraete at rug.ac.be (Sigurd Schelstraete)
  • Date: Sat, 26 Aug 1995 00:10:29 -0400
  • Organization: University of Ghent, Belgium

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


You could try the following:

Nest[f[#,a]&,x,n]

For n=3 for instance, this gives:

f[f[f[x,a],a],a]



Sigurd Schelstraete
University of Gent
Belgium


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