[R] Plotting symbols with two positions?

[Gabor Grothendieck]

Aside from the answers to use text you could use letters instead of
numbers which would allow you to continue to use a single character
and might have advantages in terms of saving space on the chart:

pch = letters[trial_no]
pch = c(letters, LETTERS)[trial_no]
pch = c(1:9, letters, LETTERS)[trial_no]


On 11/9/06, CG Pettersson <cg.pettersson at evp.slu.se> wrote:
> Thanks a lot to Demitris for a prompt answer some minutes ago on another
> tread (see below). To avoid excess mails on the list, I move onto next
> question:
>
> I have another small plotting problem that confuses me. I want to plot
> results from a field trial series, using the numbers of the trials as
> symbols in the plot.
>
> pch = as.character(trial_no)
>
> works fine, but truncates the trial number to the first digit. As I have
> sixteen trials in the series I get into problems....
>
> How do I squeeze in two positions as a symbol in a plot?
>
> All the best
> /CG
>
>
> On Thu, November 9, 2006 9:30 am, Dimitris Rizopoulos said:
> > try the following:
> >
> > x <- runif(100, -4, 4)
> > y <- 1 + 2 * x + rnorm(100, sd = 2)
> > fit <- lm(y ~ x)
> >
> > plot(x, y)
> > abline(fit)
> > legend("topleft", expression(paste(R[adj]^2, " = 0.66")))
> >
> > ## or
> >
> > plot(x, y)
> > abline(fit)
> > legend("topleft", legend = substitute(R[adj]^2 == x,
> >     list(x = summary(fit)$adj.r.squared)))
> >
> >
> > I hope it helps.
> >
> > Best,
> > Dimitris
> >
> > ----
> > Dimitris Rizopoulos
> > Ph.D. Student
> > Biostatistical Centre
> > School of Public Health
> > Catholic University of Leuven
> >
> > Address: Kapucijnenvoer 35, Leuven, Belgium
> > Tel: +32/(0)16/336899
> > Fax: +32/(0)16/337015
> > Web: http://med.kuleuven.be/biostat/
> >      http://www.student.kuleuven.be/~m0390867/dimitris.htm
> >
> >
> > ----- Original Message -----
> > From: "CG Pettersson" <cg.pettersson at evp.slu.se>
> > To: <r-help at stat.math.ethz.ch>
> > Sent: Thursday, November 09, 2006 9:10 AM
> > Subject: [R] Why do I get a linebreak in the legend?
> >
> >
> >> Dear all,
> >>
> >> W2k, R2.4.0
> >>
> >> I want to place a legend in a regression plot, stating the adjusted
> >> R-square value. After some struggle with the coding I am nearly
> >> there, but
> >> only nearly. The best try so far is:
> >>
> >> legend("topleft", expression(paste(R[adj]^2), " = 0.66"))
> >>
> >> This places the proper information in the legend, but I get a
> >> linebreak
> >> before the "= 0.66" and I want the expression on one single line.
> >> All
> >> adjustments from this code I have tried so far either produces only
> >> half
> >> the expression or produces an error message.
> >>
> >> All the best and sorry for a trivial quastion
> >> /CG
> >>
> >>
> >> --
> >> CG Pettersson, MSci, PhD Stud.
> >> Swedish University of Agricultural Sciences (SLU)
> >> Dep. of Crop Production Ekology. Box 7043.
> >> SE-750 07 Uppsala, Sweden
> >> cg.pettersson at vpe.slu.se
> >>
> >> ______________________________________________
> >> R-help at 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.
> >>
> >
> >
> > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
> >
>
>
> --
> CG Pettersson, MSci, PhD Stud.
> Swedish University of Agricultural Sciences (SLU)
> Dep. of Crop Production Ekology. Box 7043.
> SE-750 07 Uppsala, Sweden
> cg.pettersson at vpe.slu.se
>
> ______________________________________________
> R-help at 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.
>