choro.legend: choro.legend

In GISTools: Further Capabilities in Geographic Information Science

choro.legend

Description

Draw a legend for a choropleth map.

Usage

choro.legend(px, py, sh, under = "under", over = "over", 
  between = "to", fmt = "%g", cex=1, ...)

Arguments

px	x coordinate of legend location
py	y coordinate of legend location
sh	Shading scheme object used as basis for the legend
under	What to write in front of the lowest choropleth class upper limit.
over	What to write in front of the highest choropleth class lower limit.
between	What to write between the upper and lower limits of intermediate chropleth classes.
fmt	C style format for values stated in above choroplth class limits.
cex	Relative size of text in the legend.
...	Other arguments, passed on to the generic legend function.

Details

Returns no value, but draws a choropleth map legend on the current graphics device as a side effect

Value

None (see above)

Author(s)

Chris Brunsdon

See Also

choropleth, 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')

GISTools documentation built on Oct. 3, 2024, 1:08 a.m.