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Summary statistics across factor levels
2008 Apr 30
2
Summary statistics across factor levels
...r(cut(Indometh$time, breaks=c(0,2,4,6,8,10))) Indometh with(Indometh, summary(conc ~ Subject + timeclass, method="cross")) #similar with aggregate and reshape but no N or Missing count i.mean <- aggregate(Indometh$conc, list(Indometh$Subject, Indometh$timeclass), mean, na.rm=T) i.mean.rhsp <- reshape(i.mean, v.names="x", idvar="Group.1", timevar="Group.2", direction="wide") i.mean.rhsp # N and missing columns needed Thanks, Lauri