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Population estimates for several Canadian cities.
cities
This data frame contains the following columns:
a factor, consisting of the city names
a factor with 5 levels (ATL=Atlantic, ON=Ontario, QC=Quebec, PR=Prairies, WEST=Alberta and British Columbia) representing the location of the cities
a numeric vector giving population in 1000's for 1992
a numeric vector giving population in 1000's for 1993
a numeric vector giving population in 1000's for 1994
a numeric vector giving population in 1000's for 1995
a numeric vector giving population in 1000's for 1996
cities$have <- factor((cities$REGION=="ON")|(cities$REGION=="WEST")) plot(POP1996~POP1992, data=cities, col=as.integer(cities$have))
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