Hello R Masters and the Rest of Us:
The first of these works fine, the 2nd is accepted but too literal
(the "%->%" is shown in the plot label and in the wrong position).
The 3rd throws and error due to "unexpected SPECIAL". Would someone
recommend a way to format this? I want the two phrases connected by a
right arrow.
TIA, these things always elude me. Bryan
***********
Bryan Hanson
Professor of Chemistry & Biochemistry
DePauw University
xlab1 <-expression(paste("Phase Angle ", phi, " Neat-O"))
xlab2 <- expression(paste("treatment: low stress", "high
stress", sep
= "%->%"))
xlab3 <- expression(paste("treatment: low stress", %->%,
"high stress"))
plot(1:10, main = xlab1)
plot(1:10, main = xlab2)
Interesting. I don't know the explanation, but look at this:
# works
plot(1:10, 1:10, xlab=expression(a %->% b))
# doesn't work
plot(1:10, 1:10, xlab=expression(%->%))
# works
plot(1:10, 1:10, xlab=expression(paste("something" %->%
"else")))
# doesn't work
plot(1:10, 1:10, xlab=expression(paste("something", %->%,
"else")))
The "doesn't work" examples give the same error you report:
Error: unexpected SPECIAL in "plot(1:10, 1:10,
xlab=expression(%->%"
And then there's:
# doesn't work, as expected
plot(1:10, 1:10, xlab=expression(paste("something" phi
"else")))
# works
plot(1:10, 1:10, xlab=expression(paste("something", phi,
"else")))
# works
plot(1:10, 1:10, xlab=expression(paste("something" %==%
"else")))
# doesn't work
plot(1:10, 1:10, xlab=expression(paste("something", %==%,
"else")))
So it seems that when using an expression element bracketed by percent
signs, the commas in paste cause an error, even though they are
otherwise necessary. Hm.
This is on a clean R 2.11 session on linux (I know, but that's the
latest version in the UNR repository, and I don't use R enough on this
netbook to install a non-repo version). I can try again tomorrow on an
up-to-date system.
Sarah
- Hide quoted text -
On Wed, Jun 22, 2011 at 8:10 PM, Bryan Hanson <hanson at depauw.edu>
wrote:> Hello R Masters and the Rest of Us:
>
> The first of these works fine, the 2nd is accepted but too literal (the
> "%->%" is shown in the plot label and in the wrong position).
The 3rd
> throws and error due to "unexpected SPECIAL". Would someone
recommend a way
> to format this? I want the two phrases connected by a right arrow.
>
> TIA, these things always elude me. Bryan
--
Sarah Goslee
http://www.functionaldiversity.org
On Jun 22, 2011, at 8:10 PM, Bryan Hanson wrote:> Hello R Masters and the Rest of Us: > > The first of these works fine, the 2nd is accepted but too literal > (the "%->%" is shown in the plot label and in the wrong position). > The 3rd throws and error due to "unexpected SPECIAL". Would someone > recommend a way to format this? I want the two phrases connected by > a right arrow. > > TIA, these things always elude me. Bryan > *********** > Bryan Hanson > Professor of Chemistry & Biochemistry > DePauw University > > xlab1 <-expression(paste("Phase Angle ", phi, " Neat-O")) > xlab2 <- expression(paste("treatment: low stress", "high stress", > sep = "%->%")) > xlab3 <- expression(paste("treatment: low stress", %->%, "high > stress")) > > plot(1:10, main = xlab1) > plot(1:10, main = xlab2)Doesn't seem that %->% "works" without flanking terms xlab3 <- expression(treatment*":"~low~stress %->% high~stress) plot(1, main=xlab3) Or: xlab3 <- expression("treatment: low stress" %->% high~stress) plot(1, main=xlab3) -- David Winsemius, MD West Hartford, CT