From: Gabor Grothendieck <ggrothendieck_at_gmail.com>

Date: Fri 10 Feb 2006 - 07:03:50 EST

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Feb 10 08:55:46 2006

Date: Fri 10 Feb 2006 - 07:03:50 EST

I cannot explain it but I must have come across it since I noticed in various places in some of my code I have used, in terms of your example, the following:

plot(y ~ x, main = as.expression(bquote(m[1] == .(a))))

plot(y ~ x, main = list(bquote(m[1] == .(a))))

both of which work as expected.

On 2/9/06, Berton Gunter <gunter.berton@gene.com> wrote:

*>
*

> Folks:

*>
**> R 2.2.0 on Windows.
**>
**> I find the following somewhat puzzling:
**>
**> > a<-1; x<-0:1; y<-x
**>
**> ## following works fine:
**> > plot(x,y ,main= bquote(n[1] == .(a) ))
**>
**> ## following produces an error:
**> > plot(y~x ,main= bquote(n[1] == .(a) ))
**> Error in paste(n[1] == 1, " and ", n[2] == 2) : object "n" not found
**>
**> *******************************
**>
**> Note 1: I assume that this is due to the following documented behavior of
**> plot.formula():
**>
**> "Both the terms in the formula and the ... arguments are evaluated in data
**> enclosed in parent.frame() if data is a list or a data frame."
**>
**> Nevertheless, the behavior seems inconsistent to me. Am I missing something
**> (including the "I assume ..." comment)?
**>
**> Note 2: If one uses substitute() instead, it works fine:
**>
**> plot(y~x ,main= substitute(bquote(n[1] == a),list(a=a)))
**>
**>
**> Any illumination, public or private, would be appreciated.
**>
**> Cheers,
**> Bert
**>
**>
**> -- Bert Gunter
**> Genentech Non-Clinical Statistics
**> South San Francisco, CA
**>
**> "The business of the statistician is to catalyze the scientific learning
**> process." - George E. P. Box
**>
**> ______________________________________________
**> R-help@stat.math.ethz.ch mailing list
**> https://stat.ethz.ch/mailman/listinfo/r-help
**> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
**>
*

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Feb 10 08:55:46 2006

*
This archive was generated by hypermail 2.1.8
: Sat 11 Feb 2006 - 03:08:24 EST
*