制作具有已知频率的条形图

Question

Sorry for puting this silly question: I am reading the book "Using R for Introductory Statistics" and would like to create a barplot using this data

install.packages("UsingR")
library(UsingR)
head(scrabble)

   piece points frequency
1      A      1         9
4      B      3         2
7      C      3         2
10     D      2         4

The variable piece shows the letter, and the variable frequency its respective frequency in the scrabble game. Specifically, I would like to have on the X axis the letters, and on the Y axis the frequencies.

Thank you in advance

Answer 1

Take a look at barplot() , eg :

barplot(scrabble$frequency, 
        names = scrabble$piece, 
        xlab = "Piece", 
        ylab = "Frequency", 
        main = "Letter Frequencies")

To show all x-axis labels:

barplot(scrabble$frequency, 
        names = scrabble$piece, 
        xlab = "Piece", 
        ylab = "Frequency", 
        main = "Letter Frequencies", 
        las = 2, 
        cex.names = 0.5)