[R] Bug in cor.test - Spearman

[Giovanni Petris]

It works fine for me, on a Sun.

> x<-1:100
> y<-rep(c(2,3,4,5),25)
> cor.test(x,y,m="p")

	Pearson's product-moment correlation

data:  x and y 
t = 0.3837, df = 98, p-value = 0.702
alternative hypothesis: true correlation is not equal to 0 
95 percent confidence interval:
 -0.1588952  0.2333745 
sample estimates:
       cor 
0.03873177 

> cor.test(x,y,m="s")

	Spearman's rank correlation rho

data:  x and y 
S = 160195, p-value = 0.7015
alternative hypothesis: true rho is not equal to 0 
sample estimates:
       rho 
0.03873177 

Warning message: 
p-values may be incorrect due to ties in: cor.test.default(x, y, m = "s") 
> cor.test(x,y,m="s")

	Spearman's rank correlation rho

data:  x and y 
S = 160195, p-value = 0.7015
alternative hypothesis: true rho is not equal to 0 
sample estimates:
       rho 
0.03873177 

Warning message: 
p-values may be incorrect due to ties in: cor.test.default(x, y, m = "s") 
> cor.test(x,y,m="k")

	Kendall's rank correlation tau

data:  x and y 
z = 0.5132, p-value = 0.6078
alternative hypothesis: true tau is not equal to 0 
sample estimates:
       tau 
0.03481553 

-- 

 __________________________________________________
[                                                  ]
[ Giovanni Petris                 GPetris at uark.edu ]
[ Department of Mathematical Sciences              ]
[ University of Arkansas - Fayetteville, AR 72701  ]
[ Ph: (479) 575-6324, 575-8630 (fax)               ]
[ http://definetti.uark.edu/~gpetris/              ]
[__________________________________________________]