[R] Changes in expression in R 2.0.1

[Aleš Žiberna]

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".



Thank you in advance for any replies!

Ales Ziberna









I am running binary version of  R 2.0.1 (and R 1.9.1) on Windows XP

Here are the R 2.0.1 version details:

$platform
[1] "i386-pc-mingw32"



$arch
[1] "i386"



$os
[1] "mingw32"



$system
[1] "i386, mingw32"



$status
[1] ""



$major
[1] "2"



$minor
[1] "0.1"



$year
[1] "2004"



$month
[1] "11"



$day
[1] "15"



$language
[1] "R"



> .Platform
$OS.type
[1] "windows"



$file.sep
[1] "/"



$dynlib.ext
[1] ".dll"



$GUI
[1] "Rgui"



$endian
[1] "little"