Thanks very much! bquote() did the trick! on Thu, Oct 10, 2013 at 6:19 PM, William Dunlap <wdun...@tibco.com> wrote: >> changetext = expression(paste("Change from ",mini," to ", maxi, ":", >> diff ,degree,"C",collapse="")) >> >> does not evaluate my user defined variables - mini,maxi, and diff - >> just printing them out as words > > bquote() can do it: put the variables which should be evaluated in .(). E.g., > mini <- 13 > maxi <- 97 > diff <- maxi - mini > plot(0, 0, main=bquote("Change from" ~ .(mini) ~ "to" ~ .(maxi) * ":" ~ > .(diff) ~ degree ~ "C")) > > Bill Dunlap > Spotfire, TIBCO Software > wdunlap tibco.com > > >> -----Original Message----- >> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On >> Behalf >> Of Sheri O'Connor >> Sent: Thursday, October 10, 2013 1:08 PM >> To: R-help@r-project.org >> Subject: [R] Help with expression() >> >> Hi everyone, >> >> I am hoping someone can help with my attempted use of the expression >> function. I have a long series of text and variable to paste together >> including a degree symbol. The text is to be placed on my scatter plot >> using the mtext function. >> >> Using expression like this: >> >> changetext = expression(paste("Change from ",mini," to ", maxi, ":", >> diff ,degree,"C",collapse="")) >> >> does not evaluate my user defined variables - mini,maxi, and diff - >> just printing them out as words >> >> Using expression like this: >> >> changetext = paste("Change from ",mini," to ", maxi, ":", diff >> ,expression(degree,"C"),collapse="") >> >> prints the text twice and does not evaluate the degree symbol. >> >> I have tried to place the expression alone in a variable and then run the >> paste: >> >> degsym = expression(degree,"C") >> changetext = paste("Change from ",mini," to ", maxi, ":", diff >> ,degsym,collapse="") >> >> giving me the same result as the second option >> >> Is there any way I can use the expression function as in the first >> example but still have R evaluate my user defined variables? >> >> Thanks! >> Sheri >> >> --- >> Sheri O'Connor >> M.Sc Candidate >> Department of Biology >> Lakehead University - Thunder Bay/Orillia >> 500 University Avenue >> Orillia, ON L3V 0B9 >> >> ______________________________________________ >> 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.