Table of Contents

• par()
• Reset par()
• plot()
• hist()
• abline()
• curve()
• Use layout() to organize plots
• others

set.seed(871015)
x = rnorm(100)

par() reference

par()  # graphics parameters
par(c("col", "lty"))
par(col=4, lty=2)

Reset par() howto

Just call dev.off()

plot() reference

plot(x, y)
plot(xy)
plot(x)
plot(f)
plot(f, y)
plot(df)
plot(~ expr)
plot(y ~ expr)
qqnorm(x)
qqline(x)
qqplot(x, y)
hist(x)
hist(x, nclass=n)
hist(x, breaks=b, …)
dotchart(x, …)
image(x, y, z, …)
contour(x, y, z, …)
persp(x, y, z, …)

hist() reference

hist(x)

hist(x, freq=FALSE)

abline() reference

abline(a, b)
abline(h=y)
abline(v=x)
abline(lm.obj)

curve() reference

# 'x' is a special variable, which acts as a lambda placeholder
curve(dnorm(x))

curve(dnorm(x), from = -3, to = 3)

hist(x, freq=FALSE)
curve(dnorm(x), add=TRUE)

Use layout() to organize plots howto

• This is like the grid-template-areas property of CSS.
• Each number stands for the next N th plot.
• Each number in the argument matrix corresponds to the visual position of the plots.

layout(matrix(c(1, 1, 1,
                2, 3, 4,
                2, 3, 4), nr=3, byrow=T))
hist(rnorm(25), col="VioletRed")
hist(rnorm(25), col="VioletRed")
hist(rnorm(25), col="VioletRed") 
hist(rnorm(25), col="VioletRed")

others

points(x, y)
lines(x, y)
text(x, y, labels, …)
polygon(x, y, …)
legend(x, y, legend, …)
title(main, sub)
axis(side, …)