r - ggplot not seperating by value - Calling variables that start with numbers

Question

I am trying to create a violin plot with genotype on the x axis and age on the y axis.

My data.frame (df1) looks like this:

ID 1kbDel 3kbDel Age
1  WT     Homo      40
2  Het    WT        30
3  Homo   Het       60

I tried:

ggplot(df1, aes(x='1kbDel', y=Age)) + geom_violin(trim=FALSE)

Where I also changed the values of age, 1kbDel, and 3kbDel to factors. But instead of creating a plot with 3 violins (WT, Het, Homo), it creates one labeled '1kb'

I also tried changed Wt, Het, Homo to 0, 1, 2 but I get the same behavior, I dont know why

question from:https://stackoverflow.com/questions/65545971/ggplot-not-seperating-by-value-calling-variables-that-start-with-numbers

Answer 1

Use backticks to refer to variable name that start with number.

library(ggplot2)
ggplot(df1, aes(x=`16kb`, y=Age)) + geom_violin()