does this work for you? df1 = data.frame(x = rnorm(100)) df1$type = ifelse(df1$x <= 0 , "type1", "type2") df1$group<-1
df2 = data.frame(x = rnorm(50,0,2)) df2$type = ifelse(df2$x <= 0 , "type1", "type2") df2$group<-2 combined.df<-rbind(df1,df2) boxplot(combined.df$x ~ combined.df$group *combined.df$type) Filoche wrote > Hi everyone. > > I have two data frames that contain the same variables but with different > number of observation. > > I would like to know it was possible to combine the data so I can have > "paired" boxplot on the same figure. > > For example, > > df1 = data.frame(x = rnorm(100)) > df1$type = ifelse(df1$x <= 0 , "type1", "type2") > > df2 = data.frame(x = rnorm(50,0,2)) > df2$type = ifelse(df2$x <= 0 , "type1", "type2") > > ## How to combine boxplot > boxplot(df1$x~df1$type) > boxplot(df2$x~df2$type) > > df1 would be observed data whereas df2 would be simulated data. > > I would like to have the two categories (type1 and type2) on x axis and a > colour to differentiate simulated vs observed datra. > > Regards, > Phil -- View this message in context: http://r.789695.n4.nabble.com/Combining-boxplot-tp4659603p4659631.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.