Math expression in R plot

Dear all,
  In my R plot, I would like to add the title as "Estimator vs. Eta",
where I want to use the greek letter eta.
I was trying to use expression(plain("Estimator  vs.") *eta* ). It does not
seem to work.
Can anyone familiar with this give some help?

I'd try dropping the 2nd star. Remember that expressions must be valid R code. You wouldn't be able to say

a <- plain("Estimator  vs.") * eta *

either (not even if plain was an actual numeric function and eta a numeric variable).

Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com

Hi,
Try this:
plot(0,0)
?title(expression(paste(plain("Estimator vs. "),eta,sep=" ")))
A.K.




----- Original Message -----
From: li li <hannah.hlx at gmail.com>
To: r-help <r-help at r-project.org>
Cc: 
Sent: Friday, September 21, 2012 11:04 AM
Subject: [R] Math expression in R plot

Dear all,
?  In my R plot, I would like to add the title as "Estimator vs. Eta",
where I want to use the greek letter eta.
I was trying to use expression(plain("Estimator? vs.") *eta* ). It does not
seem to work.
Can anyone familiar with this give some help?

? Thank you very much.
? ? ?  Hannah

??? [[alternative HTML version deleted]]

______________________________________________
R-help at 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.

... and she might also want an additional space between "vs. and
"eta", either by inserting it within the quotes explicitly or using:

 expression(plain("Estimator vs.")~eta)

-- Bert

On Sep 21, 2012, at 17:04 , li li wrote:

Dear all,
  In my R plot, I would like to add the title as "Estimator vs. Eta",
where I want to use the greek letter eta.
I was trying to use expression(plain("Estimator  vs.") *eta* ). It does not
seem to work.
Can anyone familiar with this give some help?

I'd try dropping the 2nd star. Remember that expressions must be valid R code. You wouldn't be able to say

a <- plain("Estimator  vs.") * eta *

either (not even if plain was an actual numeric function and eta a numeric variable).

--
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com

______________________________________________
R-help at 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

Internal Contact Info:
Phone: 467-7374
Website:
http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm

Hi,
Try this:
plot(0,0)
 title(expression(paste(plain("Estimator vs. "),eta,sep=" ")))
A.K.

Will not throw an error, but perpetuates the misconception that plotmath paste() has a 'sep' argument. The space comes from the first argument and the sep argument if it were visible would occur _after_ the eta.

David.


> ----- Original Message -----
> From: li li <hannah.hlx at gmail.com>
> To: r-help <r-help at r-project.org>
> Cc: 
> Sent: Friday, September 21, 2012 11:04 AM
> Subject: [R] Math expression in R plot
> 
> Dear all,
>    In my R plot, I would like to add the title as "Estimator vs. Eta",
> where I want to use the greek letter eta.
> I was trying to use expression(plain("Estimator  vs.") *eta* ). It does not
> seem to work.
> Can anyone familiar with this give some help?
> 
>   Thank you very much.
>        Hannah
> 
>     [[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at 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 at 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.

David Winsemius, MD
Alameda, CA, USA