[R] Lattice: key with expression function
HI all, I'm trying (unsuccessfully) to add the degree symbol to each line of text in my legend (within xyplot). Here is the line of code, which fails to interpret the expression function: auto.key =list(points = FALSE,text=paste(levels(as.factor(divertSST2$temp)),expression(degree)). ..), I just get: 7 degree 8 degree 9 degree If I place 'expression' outside or just after the paste function it also doesn't work. Any suggestions are well received! Thanks Michael Folkes [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Lattice: key with expression function
On 9/5/07, Folkes, Michael <[EMAIL PROTECTED]> wrote:
> HI all,
> I'm trying (unsuccessfully) to add the degree symbol to each line of
> text in my legend (within xyplot).
> Here is the line of code, which fails to interpret the expression
> function:
>
> auto.key =list(points =
> FALSE,text=paste(levels(as.factor(divertSST2$temp)),expression(degree)).
> ..),
>
> I just get:
> 7 degree
> 8 degree
> 9 degree
That's because
> paste("foo", expression(degree))
[1] "foo degree"
> If I place 'expression' outside or just after the paste function it also
> doesn't work.
auto.key = list(text = expression(paste("foo", degree)))
should work. I think the problem is that you want a vector of
expressions, and that's a bit harder to get. I'm not sure what the
best solution is, but if everything else fails, you could try using
parse(text=)
-Deepayan
__
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
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Lattice: key with expression function
Thanks to Deepayan...again, for suggesting "parse".
Here is how I added the degree symbol to a vector of text for my xyplot
legend:
auto.key =list(points = FALSE,text=parse(text =
paste(levels(as.factor(divertSST2$temp)), "*degree", sep = ""))),
For me the tricky part was learning about adding the '*'. I found that
in this suggestion:
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/78961.html
Michael Folkes
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: September 5, 2007 11:27 AM
To: Folkes, Michael
Cc: r-help@stat.math.ethz.ch
Subject: Re: [R] Lattice: key with expression function
On 9/5/07, Folkes, Michael <[EMAIL PROTECTED]> wrote:
> HI all,
> I'm trying (unsuccessfully) to add the degree symbol to each line of
> text in my legend (within xyplot). Here is the line of code, which
> fails to interpret the expression
> function:
>
> auto.key =list(points =
> FALSE,text=paste(levels(as.factor(divertSST2$temp)),expression(degree)
> ).
> ..),
>
> I just get:
> 7 degree
> 8 degree
> 9 degree
That's because
> paste("foo", expression(degree))
[1] "foo degree"
> If I place 'expression' outside or just after the paste function it
> also doesn't work.
auto.key = list(text = expression(paste("foo", degree)))
should work. I think the problem is that you want a vector of
expressions, and that's a bit harder to get. I'm not sure what the best
solution is, but if everything else fails, you could try using
parse(text=)
-Deepayan
__
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
and provide commented, minimal, self-contained, reproducible code.
