[R] Spearman probabilities and SuppDists

[Bob Wheeler]

cor.test is giving Pr(x<0.6), SuppDists is giving Pr(x<=0.6). My 
recollection is that it is the custom in R for discrete distributions to 
include the point in the left tail.


Drew Hoysak wrote:
> cor.test and SuppDists give me different P-values for the same
> Spearman's rho.  Which is correct, or am I doing something wrong?
> 
> 
> 
> 
>>x <- c(44.4, 45.9, 41.9, 53.3, 44.7, 44.1, 50.7, 45.2, 60.1)
>>y <- c( 2.6,  3.1,  2.5,  5.0,  3.6,  4.0,  5.2,  2.8,  3.8)
> 
> 
>>cor.test(x,y,method="spearman")
> 
> 
> 	Spearman's rank correlation rho
> 
> data:  x and y 
> S = 48, p-value = 0.0968
> alternative hypothesis: true rho is not equal to 0 
> sample estimates:
> rho 
> 0.6 
> 
> 
> 
>>2*(1-pSpearman(.6,9))
> 
> [1] 0.08572531
> 
> 
> 
> 
> 
> Drew Hoysak
> 
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-- 
Bob Wheeler --- http://www.bobwheeler.com/
         ECHIP, Inc. ---
Randomness comes in bunches.