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r - Automatically adding letters of significance to a ggplot barplot using output from TukeyHSD - Stack Overflow
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3 Compact letter display(CLD) three way ANOVA and visualisation with R and ggplot2 part III - YouTube
GitHub - ethanbass/ggtukey: Easily add compact letter display (i.e. "tukey letters") to ggplot figures
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r - Automatically adding letters of significance to a ggplot barplot using output from TukeyHSD - Stack Overflow
![r - Automatically adding letters of significance to a ggplot barplot using output from TukeyHSD - Stack Overflow r - Automatically adding letters of significance to a ggplot barplot using output from TukeyHSD - Stack Overflow](https://i.imgur.com/evaiJos.png)
r - Automatically adding letters of significance to a ggplot barplot using output from TukeyHSD - Stack Overflow
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