Dear friends,
  My dataset have many zeros, so i must use fisher exact test .
Unfortunately, the fisher.test(stats) function fail to do it.
  Anybody knows how to do the fisher exact test with many zeros in the
dataset?
My dataset is:
a<-matrix(c(0,1,0,0,0,0,1,0,1,0,0,0,0,1,0,1,1,0,2,1,5,1,1,6,4,4,1,17,2,8,5,7,1,1,24,3,6,1,1,3,2,16,7,4,0,2,4,0,17,0,1,0,0,0,1,2),nrow=8,byrow=TRUE)
data.frame(a)
b<-a[,-7]
as.matrix(b)
c<-as.matrix(b)

> c
     [,1] [,2] [,3] [,4] [,5] [,6]
[1,]    0    1    0    0    0    0
[2,]    0    1    0    0    0    0
[3,]    0    1    1    0    2    1
[4,]    1    1    6    4    4    1
[5,]    2    8    5    7    1    1
[6,]    3    6    1    1    3    2
[7,]    7    4    0    2    4    0
[8,]    0    1    0    0    0    1
> fisher.test(c,workspace=200000000000000000)
错误于fisher.test(c, workspace = 2e+17) :
        外接函数调用时不能有NA(arg10)
此外: Warning message:
强制改变过程中产生了NA

Any suggestion or help are greatly appreciated.
-- 
With Kind Regards,

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Zhi Jie,Zhang ,PHD
Tel:86-21-54237149
Dept. of Epidemiology,School of Public Health,Fudan University
Address:No. 138 Yi Xue Yuan Road,Shanghai,China
Postcode:200032
Email:epistat@gmail.com
Website: www.statABC.com
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