Hello!
plot(1:10,main=expression(1 <= "m" <= 5))
The above command works perfectly in R 1.9.1 but returns an error in R 2.0.1
This is documented in NEWS for R 2.0.0 (or ONEWS in R 2.0.1) and it is said:
o R no longer accepts associative use of relational operators. That is, 3 < 2 < 1 (which used to evalute as TRUE!) now causes a syntax error. If this breaks existing code, just add parentheses -- or braces in the case of plotmath.
It is true that the following command does not give en error, however, I do not what the extra brackets in the plot:
plot(1:10,main=expression(1 <= ("m" <= 5)))
Is it possible to have this thing plotted with the same look as in R 1.9.1?
I apologize if the instruction are in NEWS, since I am not sure how to interpret exactly this section (especially : "just add parentheses -- or braces in the case of plotmath".
A good dictionary should tell you that {} rather than () is meant with "braces":
plot(1:10,main=expression(1 <= {"m" <= 5}))You have to group it syntactically, that's all.
Uwe Ligges
Thank you in advance for any replies!
Ales Ziberna
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