[R] t.test per line

[Mohamed Lajnef]

Dear All,

I apologize for this trivial question, I can not find the solution
I try to use t.test function per line  in the data.frame, But i 
dont'understand the error message

my program is as follows

group1<-gl(2,20)
fun<-function(x){
 m<-data.frame(group1,x)
   #anova(aov(x ~ group1, m))
 t.est(x ~ group1,m)
}

ttest<- apply(data, 1, fun)
Error in  t.test.default(x = c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  :
  data are essentially constant


Any help would be appreciated

ML
Best



-- 


Mohamed Lajnef,IE 
INSERM U955 eq 15
Pôle de Psychiatrie
Hôpital CHENEVIER
40, rue Mesly
94010 CRETEIL Cedex FRANCE
Mohamed.lajnef at inserm.fr
tel : 01 49 81 31 31 (poste 18470)
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fax : 01 49 81 30 99