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• 18:37, 24 March 2022 Brb talk contribs created page File:Rerrorbar.svg (<pre> library(ggplot2) df <- ToothGrowth df$dosef <- as.factor(df$dose) library(dplyr) df.summary <- df %>% group_by(dosef) %>% summarise( sd = sd(len, na.rm = TRUE), len = mean(len) ) df.summary p1 <- ggplot(df, aes(dosef, len)) + geom_jitter(position = position_jitter(0.2, seed=1), color = "darkgray") + geom_point(aes(x=dosef, y=len), shape="+", size=8, data=df.summary) + geom_errorbar(aes(ymin = len-sd, ymax = len+sd), width=.2, data = df.summary) df.summary$dose <...)