[R] Plotting legend outside of chart area

[Samantha Allcock]

Hello,

I am trying to add a legend to my PCA plot so that it looks neat. I think plotting this outside of the chart area would be good but I cannot seem to fathom the correct code for this. I wondered if anyone could help please?

The code I am using is as follows:

grp<- with(Matan, cut(R_category_no,14, labels=1:14))
cols <- c("grey0", "wheat", "red", "cyan", "orange", "darkolivegreen2", "purple3",
"royalblue", "burlywood4", "orchid", "forestgreen", "green",
"gray", "yellow1")
plot(geopca, display="sites", scaling=3, type="n")
points(geopca, display="sites", scaling=3, col=cols[grp], pch=16)

legend("bottomright", col=c("grey0", "wheat", "red", "cyan", "orange", "darkolivegreen2",
"purple3", "royalblue", "burlywood4", "orchid", "forestgreen", "green",
"gray", "yellow1"), c("Control type 1", "Control type 2",
"External/Courtyard", "Midden", "Animal Occupation",
"External fire installations and ashy deposits",
"Internal fire installations and ashy deposits", "Hearth make-up",
"Floors and surfaces", "Plasters and clay features", "Storage features",
"Platforms and benches", "Mortars", "Roofs and roofing materials"), pch=16,
cex=0.75, bty="n")

Thank you for your time in advance


Dr Samantha Lee Allcock
Faculty of Science and Technology
Department of Archaeology, Anthropology and Forensic Science
Christchurch House Rm: C133
Bournemouth University
Talbot Campus
Poole
BH12 5BB
Tel: 01202 9(62474)

sallcock at bournemouth.ac.uk<mailto:sallcock at bournemouth.ac.uk>
research.bournemouth.ac.uk/2014/07/inea-project-2


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