Hi,
I was wondering if you could help me:
The following are the first few lines of my data set:
subject group condition depvar
s1 c ver 114.87
s1 c feet 114.87
s1 c body 114.87
s2 c ver 73.54
s2 c feet 64.32
s2 c body 61.39
s3 a ver 114.87
s3 a feet 97.21
s3 a body 103.31 etc.
I entered the following ANOVA command:
dat <- read.table("mydata.txt", header=T)
summary(aov(depvar ~ group * condition + Error(subject), data=dat))
Error: subject
Df Sum Sq Mean Sq F value Pr(>F)
group 1 443.3 443.3 1.0314 0.3185
Residuals 28 12035.3 429.8
Error: Within
Df Sum Sq Mean Sq F value Pr(>F)
condition 2 615.82 307.91 6.6802 0.002501 **
group:condition 2 61.51 30.75 0.6672 0.517168
Residuals 56 2581.18 46.09
---
Signif. codes: 0 *** 0.001 ** 0.01 * 0.05 . 0.1 1
I cannot find a way to perform a Tukey HSD on the main effect of condition.
since the ANOVA formula contains the 'error' command.
Could you help me please?
Kurt
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