[R] Boxplot superscript y-axis

[Carlos Rivera]

Dear Prof. Eduardo,

Try this:

rot<-expression(paste("DGL growth (cm.yr"^"-1",")"))
boxplot(five$gr13~five$Code, xlab="Species code", ylab=rot)

In this page there are some useful mathematical annotations in R:
http://stat.ethz.ch/R-manual/R-patched/library/grDevices/html/plotmath.html

Best wishes,

Carlos Rivera


-----Mensaje original-----
De: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] En
nombre de eduardo van den Berg
Enviado el: martes, 29 de mayo de 2012 17:24
Para: r-help at r-project.org
Asunto: [R] Boxplot superscript y-axis

Dear list,

I need to include in a superscript number (-1) in a y-axis label of a
boxplot graphic. I tried the following line:

>boxplot(five$gr13~five$Code, xlab="Species code",
ylab=substitute(paste("DGL growth (cm.yr"^{-1},")")))

It returns the following error message:

Error in "DGL growth (cm.yr"^{ : non-numeric argument to binary operator

I used the same line for the plot function in another graphic and it worked
perfectly well.

Any suggestions?


--
Prof. Eduardo van den Berg
Dpto. de Biologia - Universidade Federal de Lavras Cx. P. 3037 37200-000,
Lavras, MG, Brasil Tel 35-3829-1917 E-mail eduardo.lavras at gmail.com

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