Hi there,
I just noticed that "crt" is a graphical parameter, which is stated as follows
in the help page of "par":
A numerical value specifying (in degrees) how single characters should be
rotated. It is unwise to expect values other than multiples of 90 to work...
However, I did not find any code example to demo the usage of "crt", and even
know how to present a *single character* in R. It seems that R treats "A" as a
string. If I wanted to rotated it in a plot, I could use "text" function with
"srt" argument. But how to use "crt"?
Another related question, how to mirror a character in R plot? For example, the
mirror of "R" is something like "Я".
Any hint? Thanks in advance.
Best,
Jinsong
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