summary with variance / sd
Hi J?rg, ?by here probably something like by(data=mydata,INDICES=mydata$group, FUN=sd, ...) HTH, Stephan J?rg Gro? schrieb:
Hi, I have a data frame and would like to have summary statistics for grouped data. With summary() I get the central tendencies for the overall data. How can I get descriptive statistics with variances and standard deviations? for example my data.frame: group x y exp 2 4 exp 3 5 exp 2 4 control 1 2 control 2 3 control 1 2 now I want tables with summary statistics (variances included) for each group. Is there an easy way to get this?
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