This function provides three types of approximations of the distribution
function of Spearman's rho. Besides the two approximations
used in cor.test(,method="spearman")
, which are AS89 and the t-distribution,
this function allows to use precomputed null distribution for n <= 22
.
See spearman.test
for the details of the algorithm used to compute this
null distribution.
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s |
The observed value of S statistics |
n |
The number of observations. |
lower.tail |
If TRUE (the default), the probability of |
approximation |
Selection of the method of approximation of the distribution function. |
See spearman.test
for more detail.
Depending on lower.tail
, either the probability of S <= s
or of S >= s
is computed, where S is the statistics
sum((rank(x) - rank(y))^2)
.
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