Às 09:25 de 30/03/2023, Jinsong Zhao escreveu:
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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Hello,
You are right, according to this not very old R-Help thread [1] there
are no user-level functions that use crt. Characters are treated as
character *strings* and rotated with srt.
txt <- "Rui Barradas"
plot(1, type = "n")
text(1, 1, txt, srt = 180)
As for how to mirror characters, I don't know the answer.
[1] https://stat.ethz.ch/pipermail/r-help/2017-May/446635.html
Hope this helps,
Rui Barradas
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