[R] single character in R, and how to manipulate it

[Jinsong Zhao]

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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