draw.bubble: Draw bubble plots in an existing plot

In mapplots: Data Visualisation on Maps

Draw bubble plots in an existing plot

Description

Bubble plots are plots of circles whose surfaces areas are proportional to values in z.

Usage

draw.bubble(x, y, z, maxradius = 1, ...)

Arguments

x,y	vector with x and y-locations of the centre of the bubbles.
z	vector with positive values to correspond with the surface area of the bubbles.
maxradius	the radius of the largest bubble in units of the y-scale.
...	other arguments to be passed to points

Author(s)

Hans Gerritsen

Examples

data(landings)
data(coast)
xlim <- c(-12,-5)
ylim <- c(50,56)
agg <- aggregate(list(z=landings$LiveWeight),list(x=landings$Lon,y=landings$Lat),sum)
basemap(xlim, ylim, main = "Gadoid landings")
draw.shape(coast, col="cornsilk")
draw.bubble(agg$x, agg$y, agg$z, maxradius=0.5, pch=21, bg="#00FF0050")
legend.z <- round(max(agg$z)/1000,0)
legend.bubble("topright", z=legend.z, maxradius=0.5, inset=0.02, bg="lightblue", txt.cex=0.8,
 pch=21, pt.bg="#00FF0050")

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