A variety of reported crash data cross-classified by time (hour
of the day) and day of the week, accumulated over 2009. These
include fatalities and injuries (by car), trucks, motor cycles,
bicycles and pedestrians. There are some alcohol-related
data too.
Blood alcohol level (milligrams alcohol per 100 millilitres of blood).
Details
Each cell is the aggregate number of crashes reported at each
hour-day combination, over the 2009 calendar year.
The rownames of each data frame is the
start time (hourly from midnight onwards) on a 24 hour clock,
e.g., 21 means 9.00pm to 9.59pm.
For crashes,
chrashi are the number of injuries by car,
crashf are the number of fatalities by car
(not included in chrashi),
crashtr are the number of crashes involving trucks,
crashmc are the number of crashes involving motorcyclists,
crashbc are the number of crashes involving bicycles,
and
crashp are the number of crashes involving pedestrians.
For alcohol-related offences,
alcoff are the number of alcohol offenders from
breath screening drivers,
and
alclevels are the blood alcohol levels of fatally injured drivers.
Motor Vehicles Crashes in New Zealand 2009;
Statistical Statement Calendar Year 2009.
Ministry of Transport, NZ Government;
Yearly Report 2010.
ISSN: 1176-3949
See Also
rrvglm,
rcim,
grc.
Examples
## Not run: plot(unlist(alcoff), type = "l", frame.plot = TRUE,
axes = FALSE, col = "blue", bty = "o",
main = "Alcoholic offenders on NZ roads, aggregated over 2009",
sub = "Vertical lines at midnight (purple) and noon (orange)",
xlab = "Day/hour", ylab = "Number of offenders")
axis(1, at = 1 + (0:6) * 24 + 12, labels = colnames(alcoff))
axis(2, las = 1)
axis(3:4, labels = FALSE, tick = FALSE)
abline(v = sort(1 + c((0:7) * 24, (0:6) * 24 + 12)), lty = "dashed",
col = c("purple", "orange"))
## End(Not run)
# Goodmans RC models
## Not run:
fitgrc1 <- grc(alcoff) # Rank-1 model
fitgrc2 <- grc(alcoff, Rank = 2, Corner = FALSE, Uncor = TRUE)
Coef(fitgrc2)
## End(Not run)
## Not run: biplot(fitgrc2, scaleA = 2.3, Ccol = "blue", Acol = "orange",
Clabels = as.character(1:23), xlim = c(-1.3, 2.3),
ylim = c(-1.2, 1))
## End(Not run)