Trouble with R's ggplot2 not displaying legend for custom color scale
I'm learning this framework and I'm migrating some code and Can someone help me understand After trying multiple solutions online, I still can't figure this out..... I'm having trouble with a ggplot2 plot where the legend is not displaying correctly for my custom color scale. I'm using ggplot2 version 3.3.5 and trying to create a scatter plot with points colored based on a categorical variable. Initially, I set the colors using `scale_color_manual`, but the legend doesn't show up as expected. Here's the code I'm using: ```R library(ggplot2) # Sample data set.seed(42) data <- data.frame( x = rnorm(100), y = rnorm(100), category = sample(c('A', 'B', 'C'), 100, replace = TRUE) ) # Plot code p <- ggplot(data, aes(x = x, y = y, color = category)) + geom_point(size = 3) + scale_color_manual(values = c('A' = 'red', 'B' = 'blue', 'C' = 'green')) + theme_minimal() print(p) ``` When I run this code, the points are colored correctly, but I don't see a legend for the categories. I've tried adding `guides(color = guide_legend())` but it still doesn't appear. I suspect it might have something to do with how I am specifying the colors or the aesthetic mappings. Have I missed something in the configuration? Any help would be appreciated! For context: I'm using R on Linux. Is there a better approach? I've been using R for about a year now. Any ideas what could be causing this? This is happening in both development and production on Ubuntu 20.04. Any pointers in the right direction?