Plot Annotation
Usage
title(main = "", sub = "", xlab = "", ylab = "", ...)
Arguments
main
|
The main title (on top) using font and size (character
expansion) par("font.main") and color
par("col.main").
|
sub
|
Sub-title (at bottom) using font and size
par("font.sub") and color par("col.sub").
|
xlab
|
X axis label using font and character expansion
par("font.axis") and color par("col.axis").
|
ylab
|
Y axis label, same font attributes as xlab.
|
...
|
further graphical parameters (from par).
|
Description
This function can be used to add labels to a plot. Its first four
principal arguments can also be used as arguments in most high-level
plotting functions. They must be of type character or
expression. In the latter case, quite a bit of
mathematical notation is available such as sub- and superscripts,
greek letters, fractions, etc.See Also
mtext, text.Examples
plot(cars, main = "")
title(main = "Stopping Distance versus Speed")
x <- seq(-4, 4, len = 101)
y <- cbind(sin(x), cos(x))
matplot(x, y, type = "l", xaxt = "n",
main = expression(paste(plain(sin) * phi, " and ",
plain(cos) * phi)),
ylab = expression("sin" * phi, "cos" * phi), # only 1st is taken
xlab = expression(paste("Phase Angle ", phi)),
col.main = "blue")
axis(1, at = c(-pi, -pi/2, 0, pi/2, pi),
lab = expression(-pi, -pi/2, 0, pi/2, pi))
abline(h = 0, v = pi/2 * c(-1,1), lty = 2, lwd = .1, col = "gray70")
plot(cars, main = "")
title(main = "Stopping Distance versus Speed")
x <- seq(-4, 4, len = 101)
y <- cbind(sin(x), cos(x))
matplot(x, y, type = "l", xaxt = "n",
main = expression(paste(plain(sin) * phi, " and ",
plain(cos) * phi)),
ylab = expression("sin" * phi, "cos" * phi), # only 1st is taken
xlab = expression(paste("Phase Angle ", phi)),
col.main = "blue")
axis(1, at = c(-pi, -pi/2, 0, pi/2, pi),
lab = expression(-pi, -pi/2, 0, pi/2, pi))
abline(h = 0, v = pi/2 * c(-1,1), lty = 2, lwd = .1, col = "gray70")