[R] Permutation test, grouped data

Tom Backer Johnsen backer at psych.uib.no
Fri Nov 2 15:16:37 CET 2007

I am perfectly aware that this question is not an R question, at least 
not yet, but I have not succeeded in finding what I want in other 
ways, so ...

What I am looking for are two algorithms, preferabley in Pascal, but 
other languages may do.  For (a) systematic (complete) permutations 
for grouped data with unequal group sizes, and (b) random permutations 
for the same kind of data.  I know of one source: E. S. Edgington 
(1980): Randomization Tests (program 4.1 and program 4.3), but those 
are written in Fortran with a lot of GO TO's which probably would not 
be very efficient even if I managed to manually these programs and do 
a correct translation.  There must be some more modern ones around, 
but where?

I need the algorithms for a program I have written for exploring 
structural balance in sociometric group structures.


| Tom Backer Johnsen, Psychometrics Unit,  Faculty of Psychology |
| University of Bergen, Christies gt. 12, N-5015 Bergen,  NORWAY |
| Tel : +47-5558-9185                        Fax : +47-5558-9879 |
| Email : backer at psych.uib.no    URL : http://www.galton.uib.no/ |

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