>>>>> "Earl" == Earl F Glynn <[EMAIL PROTECTED]>
>>>>> on Thu, 14 Jul 2005 12:22:49 -0500 writes:
Earl> The Partek package (www.partek.com) allows only two selections for
Multiple
Earl> Test Correction: Bonferroni and Dunn-Sidak. Can anyone suggest why
Partek
Earl> implemented Dunn-Sidak and not the other methods that R has? Is
there any
Earl> particular advantage to the Dunn-Sidak method?
Earl> R knows about these methods (in R 2.1.1):
>> p.adjust.methods
Earl> [1] "holm" "hochberg" "hommel" "bonferroni" "BH" "BY" "fdr"
Earl> [8] "none"
Earl> BH is Benjamini & Hochberg (1995) and is also called "fdr" (I wish R's
Earl> documentation said this clearly). BY is Benjamini & Yekutieli (2001).
The current R docu has
>> The '"BH"' and '"BY"' method of Benjamini, Hochberg, and Yekutieli
>> control the false discovery rate, the expected proportion of false
>> discoveries amongst the rejected hypotheses. The false discovery
>> rate is a less stringent condition than the family wise error
>> rate, so these methods are more powerful than the others.
so both "BH" and "BY" ``are FDR versions''.
"fdr" was used - unfortunately - in some older versions of R,
so we kept it working as an *alias* for the time being.
You should rather not know about it :-)
and use "BH" or "BY" (and maybe other methods in the future) instead.
Regards,
Martin
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