Nothing
par(mar = c(4, 4, 2, 2), cex.main = 1)
x = 10 * 1:nrow(volcano)
y = 10 * 1:ncol(volcano)
filled.contour(x, y, volcano,
color = terrain.colors,
plot.title = title(
main = "The Topography of Maunga Whau",
xlab = "Meters North", ylab = "Meters West"
),
plot.axes = {
axis(1, seq(100, 800, by = 100))
axis(2, seq(100, 600, by = 100))
},
key.title = title(main = "Height\n(meters)"),
key.axes = axis(4, seq(90, 190, by = 10))
)
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