vcdExtra (version 0.8-5)

CyclingDeaths: London Cycling Deaths

Description

A data frame containing the number of deaths of cyclists in London from 2005 through 2012 in each fortnightly period. Aberdein & Spiegelhalter (2013) discuss these data in relation to the observation that six cyclists died in London between Nov. 5 and Nov. 13, 2013.

Usage

data(CyclingDeaths)

Format

A data frame with 208 observations on the following 2 variables.

date

a Date

deaths

number of deaths, a numeric vector

References

Aberdein, Jody and Spiegelhalter, David (2013). Have London's roads become more dangerous for cyclists? Significance, 10(6), 46--48.

Examples

data(CyclingDeaths)

plot(deaths ~ date, data=CyclingDeaths, 
  type="h", 
	lwd=3, 
	ylab="Number of deaths", 
	axes=FALSE)
axis(1, at=seq(as.Date('2005-01-01'), 
               by='years', 
               length.out=9), 
     labels=2005:2013)
axis(2, at=0:3)

# make a one-way frequency table
CyclingDeaths.tab <- table(CyclingDeaths$deaths)

gf <- goodfit(CyclingDeaths.tab)
gf
summary(gf)

rootogram(gf, xlab="Number of Deaths")
distplot(CyclingDeaths.tab)

# prob of 6 or more deaths in one fortnight
lambda <- gf$par$lambda
ppois(5, lambda, lower.tail=FALSE)