choropleth: Choropleth Mapping

In UScensus2000: US Census 2000 Suite of R Packages

Description

A function geared to making choropleth maps easier to construct for the US Census Data.

Usage

choropleth(sp, dem = "pop2000", 

cuts = list("quantile", seq(0, 1, 0.25)), 

color = list(fun = "hsv", 

attr = list(h = c(0.4, 0.5, 0.6, 0.7), 

s = 0.6, v = 0.6, alpha = 1)), main = NULL, 

sub = "Quantiles (equal frequency)", border = "transparent", 

legend = list(pos = "bottomleft", 

title = "Population Count"), type = "plot", ...)

Arguments

sp	SpatialPolygonsDataFrame, must be a SpatialPolygonsDataFrame object.
dem	a character string, this must be the name of one of the data.frame objects contained within the SpatialPolygonsDataFrame (e.g. "pop2000").
cuts	a list containing "quantile" and seq object from 0 to 1.
color	a list containing a function and list of arguments for the function to produce the requested color scheme.
main	a character string, this will be the title of the plot.
sub	a character string, this will be the subtitle on the plot.
border	a character string, this selects the border color of the polygons.
legend	a list containing first where to place the legend and second a title for the legend.
type	a character string, can be either "plot" or "spplot".
...	Only arguments available in plot.

Details

choropleth is simply a convenient front end for plot and spplot specifically for use in making quick choropleth maps of US Census data.

Value

a plot or lattice object.

Author(s)

Zack W Almquist

References

Zack W. Almquist (2010). US Census Spatial and Demographic Data in R: The UScensus2000 Suite of Packages. Journal of Statistical Software, 37(6), 1-31. http://www.jstatsoft.org/v37/i06/.

See Also

spplot, plot

Examples

library(UScensus2000tract)
data(oregon.tract)

###Using plot
choropleth(oregon.tract,"pop2000",
color = list(fun = "rainbow",
 attr = list(4)),
 main="2000 US Census Tracts \n Oregon Tracts",
 type="plot",border="transparent")



###Using spplot
choropleth(oregon.tract,"pop2000",
main="2000 US Census Tracts \n Oregon Tracts",
border="transparent",type="spplot")

UScensus2000 documentation built on May 2, 2019, 5:13 p.m.