Here we demonstrate how to plot easily a barplot of group means +/- standard error with individual observations.
Example data sets
d <- as.data.frame(mtcars[, c("am", "hp")]) d$rowname <- rownames(d) head(d)
## am hp rowname ## Mazda RX4 1 110 Mazda RX4 ## Mazda RX4 Wag 1 110 Mazda RX4 Wag ## Datsun 710 1 93 Datsun 710 ## Hornet 4 Drive 0 110 Hornet 4 Drive ## Hornet Sportabout 0 175 Hornet Sportabout ## Valiant 0 105 Valiant
The latest version of ggpubr can be installed as follow:
# Install ggpubr if(!require(devtools)) install.packages("devtools") devtools::install_github("kassambara/ggpubr")
Bar plot of group means with individual informations
- Plot y = “hp” by groups x = “am”
- Add mean +/- standard error and individual points: add = c(“mean_se”, “point”). Allowed values are one or the combination of: “none”, “dotplot”, “jitter”, “boxplot”, “point”, “mean”, “mean_se”, “mean_sd”, “mean_ci”, “mean_range”, “median”, “median_iqr”, “median_mad”, “median_range”.
- Color and fill by groups: color = “am”, fill = “am”
- Add row names as labels.
library(ggpubr) # Bar plot of group means + points ggbarplot(d, x = "am", y = "hp", add = c("mean_se", "point"), color = "am", fill = "am", alpha = 0.5)+ ggrepel::geom_text_repel(aes(label = rowname))
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