Hi, You can try this, though I hope to learn of a better way to do it,
a = c(quote(alpha),quote(beta),quote(gamma)) b = lapply(1:3, function(x) as.character(x)) c = c(quote('-10'^th), quote('-20'^th), quote('-30'^th)) testplot <- function(a,b,c) { text <- lapply(seq_along(a), function(ii) bquote(.(a[[ii]])*.(b[[ii]])*.(c[[ii]]))) dev.new() plot(-5:5,-5:5,col=0) for (i in seq_along(a)) { text(x=i, y=i, labels=text[[i]]) } } testplot(a,b,c) HTH, baptiste 2009/11/20 Sebastien Bihorel <sebastien.biho...@cognigencorp.com>: > Dear R-users, > > I am developing a plotting function, which receives expressions and > character/numerical vectors as part of the many input arguments and which > tries to concatenate them before displaying the result to the plot. I > currently cannot find a way to make this concatenation works. I have read > several posts in the list that solved this problem by pasting the different > elements together before creating the expressions (like in > http://tolstoy.newcastle.edu.au/R/help/02a/4790.html). I cannot implement > this solution because my expressions and numerical/character vectors are > passed to the function and not create inside the function. I would greatly > appreciate any help with the following example code. > > Thank you > > > testplot <- function(a,b,c) { > > text <- as.expression(paste(a,b,c,sep=' ')) > > dev.new() > > plot(-5:5,-5:5,col=0) > > for (i in 1:3) { text(x=i, > y=i, > labels=text[i]) > } > } > > a <- as.expression(c(bquote(alpha),bquote(beta),bquote(gamma))) > > b <- as.expression(1:3) > > c <- as.expression(c(bquote('-10'^th), > bquote('-20'^th), > bquote('-30'^th))) > > testplot(a,b,c) > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.