legend.pie: Legend for pie plots

In mapplots: Data Visualisation on Maps

Legend for pie plots

Description

Draw a legend for a draw.pie plot.

Usage

legend.pie(x, y = NULL, z, labels, radius = 1, bty = "o", mab = 1.2, bg = NULL, 
	inset = 0, ...)

Arguments

x, y	the x and y co-ordinates to be used to position the legend. x can be a keyword (e.g. "topleft". See legend.
z	optional vector of non-negative numerical quantities. The values in z are displayed as the areas of pie slices in the legend.
labels	character vector (same length as z) with labels for the pies.
radius	the radius of the pie to be displayed.
bty	single character indicating the type of box to be drawn around the legend. The allowed values are "o" (the default) and "n" (no box).
mab	the margin around the pie. i.e. how much space should there be between the pie and the legend box. relative to the size of the pie.
bg	background colour of the legend box.
inset	inset distance(s) from the margins as a fraction of the plot region when legend is placed by keyword.
...	any other arguments to be passed on to add.pie.

Author(s)

Hans Gerritsen

Examples

data(landings)
data(coast)
xlim <- c(-12,-5)
ylim <- c(50,56)
xyz <- make.xyz(landings$Lon,landings$Lat,landings$LiveWeight,landings$Species)
col <- rainbow(5)
basemap(xlim, ylim, main = "Species composition of gadoid landings")
draw.shape(coast, col="cornsilk")
draw.pie(xyz$x, xyz$y, xyz$z, radius = 0.3, col=col)
legend.pie(-13.25,54.8,labels=c("cod","had","hke","pok","whg"), radius=0.3, bty="n", col=col,
 cex=0.8, label.dist=1.3)
legend.z <- round(max(rowSums(xyz$z,na.rm=TRUE))/10^6,0)
legend.bubble(-13.25,55.5,z=legend.z,round=1,maxradius=0.3,bty="n",txt.cex=0.6)
text(-13.25,56,"landings (kt)",cex=0.8)

mapplots documentation built on Aug. 25, 2023, 5:15 p.m.