[R] Help LSD multiple comparison test

[Mendiburu, Felipe (CIP)]

Dear Tu,

Use library(agricolae)
LSD.test(), It is necessary to aov()

comparison <- LSD.test(yield,virus,df,MSerror,group=F)

Comparison between treatments means

  tr.i tr.j       diff pvalue
1    1    2 11.5333333 0.0176
2    1    3 11.9333333 0.0151
3    1    4 12.5000000 0.0121
4    2    3 23.4666667 0.0003
5    2    4 24.0333333 0.0003
6    3    4  0.5666667 0.8873

or

comparison <- LSD.test(yield,virus,df,MSerror, group=T)

Least Significant Difference 8.928965
Means with the same letter are not significantly different.

Groups, Treatments and means
a        oo      36.9 
a        ff      36.33333 
 b       cc      24.4 
  c      fc      12.86667 

Regards,

Felipe.


-----Original Message-----
From: r-help-bounces at r-project.org
[mailto:r-help-bounces at r-project.org]On Behalf Of Chunhao Tu
Sent: Tuesday, June 23, 2009 10:41 PM
To: r-help at r-project.org
Subject: [R] Help LSD multiple comparison test



Hi R users,
I know this is a old question but I did not see any clear answer. Is there
any way or package to perform LSD test in R such as H0: A=B. H0, A=C and H0
B=C.

Thank you in advance
Tu 
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