How to group variable by quality number?-CodePudding

Here's a madeup dataset that demonstrates the general idea of what I'm working with.

Quality <- sample(1:4, 300, replace = TRUE)
reader_ID <- rep(1:3, each = 100)

df <- data.frame(Quality, reader_ID)
df

quality_percentage <- ggplot(df, aes(x = reader_ID, y = Quality, fill = Quality))  
  geom_bar(position="fill", stat="identity")

quality_percentage

Here is the graph it produced. I'm trying to have each quality grouped together instead of having them all separate.

CodePudding user response：

You can simply sort your data frame by Quality before plotting:

ggplot(df[order(df$Quality),], 
       aes(x = reader_ID, y = Quality, fill = Quality))  
  geom_col(position = "fill")