Hi there,
I hope to rotate the Y label of axis(4) with -90 degree. I can typeset
the Y label using text() with srt = -90. However, I cannot get the
coordinate of the position that mtext() used.
In other words, I hope to convert:
mtext("Y label", side = 4, at = 0, line = 2)
to
text(x, 0, "Y label", str = -90)
Now, I don't know how to get the x in the above expression. I can give
it an arbitrary value. However, I hope it could be more precise.
Thanks a lot for any suggestions.
Regards,
Jinsong
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