qqline(x, ...) qqline(x, weights = NULL, freq = NULL, ...)
NULL, or vector of weights the same length as
x.
Quartiles are calculated for the weighted distribution with probabilities
proportional to
weights on the values of
x.
NULL, or vector the same length as
x, used to replicate values of
x.
Quartiles are calculated for the weighted distribution with probabilities
proportional to
freq (or product of
weights and
freq) on the values of
x.
abline
(which actually draws the line).
This is generally used after a call to
qqnorm.
qqnorm(car.time) qqline(car.time, col=3)