R help - Jun 2008 - permutation distribution for Friedman test

Hi
I am looking to generate permutations for data tested using the
friedman.test.  Just read a paper by Joachim Rohmel, "The permutation
distribution of the Friedman test" (Computational Statistics & Data
Analysis
1997, 26: 83-99).  He offers APL code for carrying out these procedures;
wondering if anyone has recoded this program for R?

Any direction/help on this would be very much appreciated.

Michael

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