Creating ggplots bar diagram in Shiny

shiny
,
3

Try with aes_string(), it should be something like this although I can't test it since you haven't provided a reproducible example.

ggplot(df.long, aes_string(x = input$show_vars3,
                                       y = "value",
                                       fill = input$show_vars4)) + 
            geom_col(position = "dodge")

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