Match tukey test results (letters or asteriks resulting from the HSD.test function) and set them to their corresponding bar in a barplot. It takes into account possible facets from ggplot2.
vicruiser/tukey_test_plot
Match tukey test results (letters groups or asteriks from HSD.test function) to the corresponding bar in barplots taking into account the function facets() from the package ggplot2.
R