openintro (version 2.4.0)

london_murders: London Murders, 2006-2011

Description

This dataset contains the victim name, age, and location of every murder recorded in the Greater London area by the Metropolitan Police from January 1, 2006 to September 7, 2011.

Usage

london_murders

Format

A data frame with 838 observations on the following 5 variables.

forename

First name(s) of the victim.

age

Age of the victim.

date

Date of the murder (YYYY-MM-DD).

year

Year of the murder.

borough

The London borough in which the murder took place. See the Details section for a list of all the boroughs.

Details

To visualize this data set using a map, see the london_boroughs dataset, which contains the latitude and longitude of polygons that define the boundaries of the 32 boroughs of Greater London.

The borough variable covers all 32 boroughs in Greater London: Barking & Dagenham, Barnet, Bexley, Brent, Bromley, Camden, Croydon, Ealing, Enfield, Greenwich, Hackney, Hammersmith & Fulham, Haringey, Harrow, Havering, Hillingdon, Hounslow, Islington, Kensington & Chelsea, Kingston, Lambeth, Lewisham, Merton, Newham, Redbridge, Richmond, Southwark, Sutton, Tower Hamlets, Waltham Forest, Wandsworth, Westminster

References

Inspired by The Guardian Datablog.

Examples

library(dplyr)
library(ggplot2)
library(lubridate)

london_murders %>%
  mutate(
    day_count = as.numeric(date - ymd("2006-01-01")),
    date_cut = cut(day_count, seq(0, 2160, 90))
  ) %>%
  group_by(date_cut) %>%
  add_tally() %>%
  ggplot(aes(x = date_cut, y = n)) +
  geom_col() +
  theme(axis.text.x = element_blank(), axis.ticks.x = element_blank()) +
  labs(x = "Date from 01/2006 - 09/2011", y = "Number of deaths per 90 days")