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Extracting to jar file makes it convenient to run a Java program from command
line. But today I encountered a problem of extracting jar file with IntelliJ Idea.
The problem is that after using the...


R ggplot2 confusions

Greek letter mu is not correctly displayed

R is powerful and ggplot2 makes it more accessible.
Recently, I need to create a plot that has the Greek letter (mu) displayed as a label.
First I tried the following script in terminal
r <- ...