Variable in group_by and ggplot

tidyverse
3

Define a function, see this example with the iris dataset:

library(tidyverse)

custom_function <- function(variable) {
    group_by(iris, {{variable}}) %>%
        ggplot(aes(x = Sepal.Length, y = Sepal.Width, color = {{variable}})) + 
            theme(axis.text.x = element_text(angle = 90), legend.position="bottom", 
                  legend.text = element_text(size=10))  + 
            geom_point() + geom_line(aes(group = {{variable}}), lty = 1)
}

custom_function(Species)

Created on 2021-02-09 by the reprex package (v1.0.0)

If you need more specific help, please provide a proper REPRoducible EXample (reprex) illustrating your issue.

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