[R] MAC OSX vs Win XP: Different stats test results!

[Peter Dalgaard]

Mareen wrote:
> Hi all,
> I wondered whether anyone has some advice on a stats-related 'sanity check',
> as I ran a nonparametric multivariate test (mulrank function as decribed by
> R. Wilcox, 2005) on both systems, but got different results (please see
> below for the system-specific outputs)! The functions I used are attached as
> well. Any advice would be much appreciated! Thanks in advance for getting
> back to me!

Perhaps you should show us a summary(data03$x) on both systems. It could 
be that you are not working with the same data...

	-p

> 
> Best wishes,
> Mareen
> ------------------------------------
> Mac:
> 
>> data03<-selby2(data02, c(1,2), 3)
>> mulrank(3,6,data03$x)
> $test.stat
> [1] 0.9331133
> 
> $nu1
> [1] 11.46300
> 
> $p.value
>          [,1]
> [1,] 0.509296
> 
> $N
> [1] 233
> 
> $q.hat
>           [,1]      [,2]      [,3]      [,4]      [,5]      [,6]
> [1,] 0.4940071 0.5256726 0.5176384 0.5476290 0.4690935 0.5265100
> [2,] 0.5170627 0.4791950 0.5026431 0.4867843 0.4778865 0.5033497
> [3,] 0.4680729 0.4944258 0.4889563 0.4505391 0.5311420 0.4726002
> 
> Win:
>> mulrank(3,6, data03$x)
> $test.stat
> [1] 1.114665
> 
> $nu1
> [1] 8.155991
> 
> $p.value
>           [,1]
> [1,] 0.3491221
> 
> $N
> [1] 233
> 
> $q.hat
>           [,1]      [,2]      [,3]      [,4]      [,5]      [,6]
> [1,] 0.4940071 0.5406417 0.5236837 0.5656338 0.4771799 0.5324505
> [2,] 0.5162776 0.4801895 0.5022244 0.4960745 0.4854234 0.4820737
> [3,] 0.5013608 0.4920967 0.4810269 0.4482885 0.5326861 0.4871506
> 
> http://www.nabble.com/file/p23595008/Rallfun-v92.txt Rallfun-v92.txt 
> 


-- 
    O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
   c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
  (*) \(*) -- University of Copenhagen   Denmark      Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)              FAX: (+45) 35327907