Hi Steve,
you need to use the expression() function. I think it is described under
?plotmath. Defo works with mtext, not sure about ylab.
try
ylab(text=c(expression(paste("Hatched Eggs R"^{2}))))
etc.
----- Original Message -----
From: <steve_fried...@nps.gov>
To: <r-help@r-project.org>
Sent: Monday, May 18, 2009 3:25 PM
Subject: [R] Superscripts and subscripts in trellis graphics
I'd like to annotate an xyplot with an R^2 value, but can not find the
syntax to define the superscript format for the text.
I'd appreciate suggestions,
xyplot(SharkSloughEggs.df$Sharkeggs.rel +
SharkSloughEggs.df$SharkHatched.rel + SharkSloughEggs.df$SharkFlooded.rel
+
HSI.shark$MEAN ~ Year,
pch=c(1,9,5,4), lty=c(1,6,3,4), lwd = c(2), col = c("black",
"blue", "green", "red"),
scales=list(tick.number=length(Year)), data=SharkSloughEggs.df,
ylab="Relative Egg Success",
main="Shark Slough Alligators",
par.settings = graph.sets, type = "b")
trellis.focus()
panel.text(x=1999, y = 0.95, labels="Hatched Eggs\nR^2
= -0.18", cex = 0.75)
panel.text(x=1998, y = 0.35, labels="Number of
Eggs\nR^2 = 0.43",cex = 0.75)
panel.text(x=1995, y = 0.25, labels="Flooded Eggs\nR^2
= -0.50", cex = 0.75)
panel.text(x=1986, y = 0.3, labels="Mean HSI", cex =
0.75)
trellis.unfocus()
Thanks
Steve
Steve Friedman Ph. D.
Spatial Statistical Analyst
Everglades and Dry Tortugas National Park
950 N Krome Ave (3rd Floor)
Homestead, Florida 33034
steve_fried...@nps.gov
Office (305) 224 - 4282
Fax (305) 224 - 4147
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______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
