ggplot geom_rect() error "object not found"

Question

I'm trying to plot a geom_rect(). Why do I receive an Error in FUN(X[[i]], ...) : object 'Month' not found? If I run df$Month in my console the object is there: df$Month #> [1] 2019-01 2019-02 2019-03 #> Levels: 2019-01 2019-02 2019-03 Here's my code block: library(tidyverse) df <- tibble(Month = factor(c("2019-01", "2019-02", "2019-03")), Value = c(4, 9, 7)) ggplot(df, aes(Month, Value, group = 1)) + geom_line() + theme_minimal() + geom_rect(data = data.frame(xmin = min(as.integer(df$Month)) - 0.5, xmax = max(as.integer(df$Month)) + 0.5, ymin = min(df$Value), ymax = max(df$Value)), aes(xmin = xmin, xmax = xmax, ymin = ymin, ymax = ymax), alpha = 0.2, fill = "green") #> Error in FUN(X[[i]], ...) : object 'Month' not found JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

You just have an extra step of setting up a dataframe in geom_rect which coincide with data in ggplot. Simply provide your max and min values to geom_rect and it works: ggplot(df, aes(Month, Value, group = 1)) + geom_line() + theme_minimal() + geom_rect(aes(xmin = min(as.integer(Month)) - 0.5, xmax = max(as.integer(Month)) + 0.5, ymin = min(Value), ymax = max(Value)), alpha = 0.2/nrow(df), fill = "green")