functional programming question
See: http://finzi.psych.upenn.edu/R/Rhelp02a/archive/54896.html
On 2/4/06, Erich Neuwirth <erich.neuwirth at univie.ac.at> wrote:
Many functional programming languages have a metafunction which does the following: it has two arguments, a function and a list of objects, all of the same type. The argument function itself has two arguments of the same type as all the list objects, and the result of this function also is of the same type. then metafunction(f,list(x1,x2,....xn)) produces f(x1,f(x2,f(x3,....,f(xn-1,xn)))..) Does R have such a function, or do I need to code it myself? In Scheme (Mathematica), this metafunction is called fold (Fold). -- Erich Neuwirth, University of Vienna Faculty of Computer Science Computer Supported Didactics Working Group Visit our SunSITE at http://sunsite.univie.ac.at Phone: +43-1-4277-39464 Fax: +43-1-4277-39459
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