Better, I don't know... But alternatively, and maybe thinning the fog a bit:
set.seed(42) xxx <- rnorm(300,10,2) hist(xxx,main=bquote(Heart~~Attack~~~~bar(x) == .(mean(xxx)))) Cheers, Bert On Fri, Oct 11, 2013 at 10:23 PM, Rolf Turner <r.tur...@auckland.ac.nz> wrote: > On 10/12/13 11:39, Emily Jean Fales wrote: >> >> I am trying to get the calculated mean and the symbol of x-bar to show in >> the title of multiple histograms in R. Here is the code I have for one of >> the histograms: >> hist(outcome[,11], main= "Heart Attack (expression(bar(x))) = >> (mean(outcome[,11]))", xlab ="30-day Death Rate", xlim = c(min(hist_min), >> max(hist_max))) >> >> but the symbol will not sow up in the title just the words I have typed >> do...I am not a programmer and new to R (obviously), so any help is >> appreciated! > > > You are being confronted with the mysteries of plotmath() which are opaque > to us > ordinary mortals. My approach is to remember vaguely a few tricks and then > invoke > these tricks in a hammer-and-hope manner until something works. > > For your problem the main trick is to use bquote() and the ".()" function. > Oh, yeah. > And paste the literal bit, i.e. "Heart Attack" onto the mathematical bit. > E.g.: > > set.seed(42) > xxx <- rnorm(300,10,2) > hist(xxx,main=bquote(paste("Heart Attack ", bar(x) == .(mean(xxx))))) > > There are probably better ways. And don't ask me for an explanation; it > just seems > to work. > > HTH > > cheers, > > Rolf Turner > > ______________________________________________ > 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. -- Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374 ______________________________________________ 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.