Thanks, Gabor. Works like a charm. --sundar
Gabor Grothendieck wrote: > Try this: > >> fo <- ~ x | y >> fo[[3]] <- fo[[2]] >> fo[[2]] <- as.name("z") >> fo > > z ~ x | y > > On 6/20/06, Sundar Dorai-Raj <[EMAIL PROTECTED]> wrote: > >> Hi, all, >> >> I just recently noticed a change in terms.formula from 2.2.1 to 2.3.1 >> (possibly 2.3.0, but I didn't check). Here's the problem: >> >> ## 2.2.1 >> > update(~ x | y, z ~ .) >> z ~ x | y >> >> ## 2.3.1 >> > update(~ x | y, z ~ .) >> z ~ (x | y) >> >> and in the NEWS for 2.3.1 >> >> o terms.formula needed to add parentheses to formulae with >> terms containing '|'. (PR#8462) >> >> So, there must be a reason for this change. However, in the lattice >> framework I have this causes many problems because now the `|' is >> interpreted as a logical OR. Could someone suggest a workaround for me >> so that I still get the 2.2.1 behavior my code relies on. Here's a very >> simple test function (works in 2.2.1, fails in 2.3.1): >> >> library(lattice) >> foo <- function(x, data) { >> x <- update(x, y ~ .) >> xyplot(x, data) >> } >> z <- expand.grid(x = 1:10, g = letters[1:3]) >> z$y <- rnorm(nrow(z)) >> foo(~ x | g, z) >> >> Thanks, >> >> --sundar >> >> ______________________________________________ >> R-help@stat.math.ethz.ch mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide! >> http://www.R-project.org/posting-guide.html >> ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html