[R] display double dot over character in plotmath?

[Ranjan Maitra]

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. 

Thanks again!

Best wishes,
Ranjan



On Sun, 14 May 2017 23:57:50 +1000 Duncan Mackay <dulcalma at 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: mackay at northnet.com.au
> 
> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Ranjan
> Maitra
> Sent: Saturday, 13 May 2017 22:48
> To: r-help at 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 <djnordlund at 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
> 
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> ______________________________________________
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> 


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