> On May 14, 2017, at 9:08 AM, David Winsemius <dwinsem...@comcast.net> wrote: > >> >> On May 14, 2017, at 8:43 AM, Ranjan Maitra <mai...@email.com> wrote: >> >> Thanks, Duncan! >> >> This works for the particular case and is, to my mind, a great solution! >> >> However, I was wondering: is it possible to use these double dots with >> another character, such as omega? >> >> I apologize for changing the question somewhat, but I did not realize >> earlier that there were separate codes for putting double dots over >> different letters and I thought that figuring out the simpler question would >> be enough for me to figure out the next step. > > I think you should be looking for a LaTeX solution. There is a > tikzDevice-package. > > This says you can assemble symbols with backspaces: > > https://www.stat.berkeley.edu/~partha/symbols.pdf > > For instance, LATEX defines \hbar (“~”) as a “¯” character (\mathchar’26) > followed by a backspace of 9 math units (\mkern-9mu), followed by the letter > “h”: > > The second example in ?tikz, which could be a starting point for completing > your task fails on my Mac by only displaying the names of the glyphs but not > the glyphs themselves in the plot, but it might have a better chance of > succeeding on a Linux box.
I'm not having a lot of success finding a "naked umlaut" with which I can backspace to put above a capital \Omega but I found and answer on how to use Newtonian differentiation notation in LateX: https://tex.stackexchange.com/questions/152951/how-to-write-two-dot-above-a-letter So this now produces the desire results, thanks to Kirill Müller <krlml...@mailbox.org> tikzDevice package: #----------- library(tikzDevice) options(tikzMetricPackages = c("\\usepackage[utf8]{inputenc}", "\\usepackage[T1]{fontenc}", "\\usetikzlibrary{calc}", "\\usepackage{amssymb}")) tikz("formula.tex", width = 4, height = 4, standAlone = TRUE, packages = c("\\usepackage{tikz}", "\\usepackage[active,tightpage,psfixbb]{preview}", "\\PreviewEnvironment{pgfpicture}", "\\setlength\\PreviewBorder{0pt}", "\\usepackage{amssymb}")) par(mar = c(4, 4, 1, 1)) plot(1, type = "n", xlab = "$x_1$", ylab = "$x_2$") text(1, c(0.8), c("$\\ddot{\\Omega}$"), cex = 2.5) dev.off() tools::texi2pdf("formula.tex") system(paste(getOption("pdfviewer"), "formula.pdf")) #----------- Best; David. > > Best; > David. > > >> >> Thanks again! >> >> Best wishes, >> Ranjan >> >> >> >> On Sun, 14 May 2017 23:57:50 +1000 Duncan Mackay <dulca...@bigpond.com> >> wrote: >> >>> Hi >>> >>> I just had to do something similar in windows with \"{u}. Try Unicode symbol >>> - see ?plotmath >>> >>> ggplot(data, aes(x=X)) + geom_line(aes(y = Z), size=0.43) + >>> xlab(expression(atop(top,bold(Age~"\u00e4")))) >>> >>> Regards >>> >>> Duncan >>> >>> Duncan Mackay >>> Department of Agronomy and Soil Science >>> University of New England >>> Armidale NSW 2351 >>> Email: home: mac...@northnet.com.au >>> >>> -----Original Message----- >>> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Ranjan >>> Maitra >>> Sent: Saturday, 13 May 2017 22:48 >>> To: r-h...@stat.math.ethz.ch >>> Subject: Re: [R] display double dot over character in plotmath? >>> >>> On Fri, 12 May 2017 23:39:14 -0700 Daniel Nordlund <djnordl...@gmail.com> >>> wrote: >>> >>>> On 5/12/17 4:55 PM, Ranjan Maitra wrote: >>>>> Hi, >>>>> >>>>> Is it possible to display double dot (umlaut) over a character such as >>> would be possible using \ddot x in LaTeX? I can do this using tikzDevice but >>> I wanted something simpler to point to. >>>>> >>>>> Here is an example of what I would like to do, but it is not quite >>> there: >>>>> >>>>> require(ggplot2) >>>>> data<-as.data.frame(c("a","b","c","a","b","c")) >>>>> colnames(data)<-"Y" >>>>> data$X<-c(1:6) >>>>> data$Z<-c(1,2,3,1,2,3) >>>>> >>>>> ggplot(data, aes(x=X)) + geom_line(aes(y = Z), size=0.43) + >>> xlab(expression(atop(top,bold(Age~"à")))) >>>>> >>>>> I would like to put in a double dot over the "a" in the x-axis instead >>> of "`". >>>>> >>>>> Many thanks for any suggestions and best wishes, >>>>> Ranjan >>>>> >>>> >>>> You haven't told what OS you are using, but with Windows OS, you can get >>>> the 'ä' by making sure the NUMLOCK key is on, hold down the alt key and >>>> press 0228 on the numeric keypad. >>>> >>>> >>> >>> I am sorry, I use a linux operating system. I use Fedora 25 but the student >>> I wanted to show this uses Ubuntu, though I don't know if the distribution >>> matters. >>> >>> Thanks again for your help, and best wishes, >>> Ranjan >>> >>> ______________________________________________ >>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >>> 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 -- To UNSUBSCRIBE and more, see >>> 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. >>> >> >> >> -- >> Important Notice: This mailbox is ignored: e-mails are set to be deleted on >> receipt. Please respond to the mailing list if appropriate. For those >> needing to send personal or professional e-mail, please use appropriate >> addresses. >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> 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. > > David Winsemius > Alameda, CA, USA > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. David Winsemius Alameda, CA, USA ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
