search for: timeclass

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2008 Apr 30
2
Summary statistics across factor levels
...g "cross" option. I would like to produce similar output with N and Missing columns but produce a data.frame. Is there any built-in function for that? #example data install.packages("Hmisc") library(Hmisc) sek <- seq(1, nrow(Indometh), 9) Indometh$time[sek] <- NA Indometh$timeclass <- factor(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.r...