search for: dftest2

...ad of relative. Can that be done with ecdf or with stepfun() to get values I can use to plot the curves? Here a small example that shows the result with ecdf: library(ggplot2) library(reshape) dftest1 <- data.frame(value=runif(1000,0,1),variable=rep(c("a","b"),c(500,500))) dftest2 <- ddply(dftest1,.(variable),transform, ecd = ecdf(value)(value)) ggplot(dftest2,aes(x = value, y = ecd)) + geom_line(aes(group = variable,colour = variable)) I'd like to replace the ecdf-function in ddply with a function that gives cumulative counts resp. the cumulative position of eac...