[R] question

[kjetil@entelnet.bo]

On 8 Mar 2004 at 16:38, cfinet at ens-lyon.fr wrote:

> I do not manage to make a Fisher´s exact test with the next matrix :
> 

You can consider using chisq.test() with the argument sim=TRUE:

> mat <- matrix(scan(), 7, 12, byrow=TRUE)
1:  1    3    0    1    2    9    0    0    2     5     8     6
13:    0    3    3    0    0    0    0    5    0     3     0     0
25:    0    0    0    0    0   10    0    0    0     0    10     0
37:    0    2    0    2    6   14    0    0    6     0    10     6
49:    0    5    0    0    0    7    0    0    0     2     8     0
61:    0    0    1    9    4    7    2    1    4     2    12     5
73:    0    6    0    0    0    0    0    0    0     5     1     3
85: 
Read 84 items

> chisq.test(mat, sim=TRUE)

        Pearson's Chi-squared test with simulated p-value (based
        on 2000 replicates)

data:  mat 
X-squared = 218.3366, df = NA, p-value = < 2.2e-16

Kjetil Halvorsen



>     [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12]
> [1,]    1    3    0    1    2    9    0    0    2     5     8     6
> [2,]    0    3    3    0    0    0    0    5    0     3     0     0
> [3,]    0    0    0    0    0   10    0    0    0     0    10     0
> [4,]    0    2    0    2    6   14    0    0    6     0    10     6
> [5,]    0    5    0    0    0    7    0    0    0     2     8     0
> [6,]    0    0    1    9    4    7    2    1    4     2    12     5
> [7,]    0    6    0    0    0    0    0    0    0     5     1     3
> 
> but I do not understand why it does not work since I obtain the next
> error message :
> 
> 
> 
> > fisher.test(enfin.matrix)
> Error in fisher.test(enfin.matrix) : Bug in FEXACT: gave negative key
> 
> thank you for considering my application
> 
> cédric finet
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://www.stat.math.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html