GISTools (version 1.0-1)

choropleth: choropleth

Description

Draws a choropleth map given a spatialPolygons object, a variable and a shading scheme.

Usage

choropleth(sp, v, shading, ...)

Value

None (see above).

Arguments

sp

A SpatialPolygonsDataFrame or sf -POLYGON or - MULTIPOLYGON object.

v

The variable name to be mapped and must included in the data.

shading

A shading scheme created by shading or auto.shading.

...

Additional parameters to be passed on to the plot method for sp.

Author

Chris Brunsdon, Binbin Lu

Details

The function returns no value, but draws a choropleth map on the current graphics device as a side effect.

See Also

choro.legend, auto.shading, shading.

Examples

# Read in map data and compute a rate for mapping
# Try the sf class
data(WHData)
shades = auto.shading(WHHP[["Avg_HP_avg"]],n=7)
dev.new(width = 16, height = 12)
choropleth(sp = WHHP,v="Avg_HP_avg",shading=shades)
choro.legend(548871.4, 3377000, shades,title='Average house price')
#Try the Spatial object
shades = auto.shading(whp_sp@data[["Avg_HP_avg"]],n=6)
dev.new(width = 16, height = 12)
choropleth(sp = whp_sp,v="Avg_HP_avg",shading=shades)
choro.legend(548871.4, 3377000,  shades,title='Average house price')