here is my code:
Data$Change = Data$BPMbefore - Data$BPMafter
xyplot(Change ~ Gender, data=Data, group=CigaretteType, type=c("p","a"), auto.key=TRUE)
aggregate(Change ~ CigaretteTypeGender, data=Data, mean)
summary(aov(Change ~ CigaretteTypeGender, data=Data))
here is my error message:
here is my output, i cant get the data to show up:
thanks