Skip to content

Multiple comparisons

2 messages · Manuel Ato Garcia, Kaspar Pflugshaupt

Original
Manuel Ato Garcia
# 
Dear all:

 Is there programs or packages to do multiple comparisons of means with
between and within subject design with R system?

 Thanks in advance.

		Manuel Ato Garc?a
		Dpto. Psicolog?a B?sica y Metodolog?a
		Universidad de Murcia
		Apartado 4021
		30080 MURCIA (Spain)
		e-mail: matogar at um.es
		phone: +34 968 363477

-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
1 day later
Kaspar Pflugshaupt
#
On 27.6.2001 13:59 Uhr, Manuel Ato Garcia wrote:

            

      
      
      
    

        
The only facility for multiple comparisons in R that I'm aware of is in
package "ctest": pairwise.t.test, pairwise.wilcox.test and some more like
this (have a look at their help texts). They use the function p.adjust() (in
the base package), which uses the Hochberg adjustment by default.

I've used p.adjust() to adjust p values from multiple survival comparisons
"by hand", for which problem there seems to be no standard method. In your
case, there probably is (I do not know), so this approach would be
suboptimal. But it still might work.

Hope this helps some

Kaspar Pflugshaupt