[R] in cor.test, difference between exact=FALSE and exact=NULL
andrewjyee at gmail.com
Fri Aug 24 00:41:14 CEST 2007
Pardon my ignorance, but is there a difference in cor.test between
exact=FALSE and exact=NULL when method=spearman?
Take for example:
cor.test(x,y, method="spearman", exact=NULL)
This gives an error message,
Warning message: Cannot compute exact p-values with ties in:
cor.test.default(x, y, method = "spearman", exact = NULL)
However, when exact is changed to FALSE, this seems to run okay.
cor.test(x,y, method="spearman", exact=FALSE)
Question: should this be exact = FALSE in the documentation and/or the code?
MGH Cancer Center
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