Add letters automatically over errorbar of the boxplot in ggplot2

General
1

Hi,

I want to show significant differences in my boxplot (ggplot2) in R. I found how to generate label using Tukey test. However, I'm struggling at placing label on top of each errorbar.

Here the problematic line in my R script:

geom_text(data = Tukey_test, aes(x = Genotype, y = Value, label = Letters_Tukey))

By using this line (y=Value), the letters (label) for significant differences are placed in the middle of each box. How do I manage to find these letters just above the errorbar?

Rplot01
Rplot01725×558 41.6 KB

Thanks for your help !

Alan

2

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