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Last data update: 2014.03.03

R: Geographic map with regions defined as polygons

polys.map

R Documentation

Geographic map with regions defined as polygons

Description

This function produces a map with geographic regions defined by polygons. It is essentially the same function as polys.plot() in mgcv but with added arguments zlim and rev.col and a wider set of choices for scheme.

Usage


polys.map(lm, z, scheme = "gray", lab = "", zlim, rev.col = TRUE, ...)

Arguments

`lm`	Named list of matrices where each matrix has two columns. The matrix rows each define the vertex of a boundary polygon.
`z`	A vector of values associated with each area (item) of `lm`.
`scheme`	Possible values are `"heat"`, `"terrain"`, `"topo"`, `"cm"` and `"gray"`, indicating how to fill the polygons in accordance with the value of `z`.
`lab`	label for plot.
`zlim`	If missing then the range of z will be chosen using `pretty(z)` otherwise the range provided will be used.
`rev.col`	If `FALSE` then coloring scheme is not reversed.
`...`	other arguments to pass to plot.

Details

See help file of polys.plot in mgcv.

Value

It produces a plot.

Author(s)

Maintainer: Giampiero Marra giampiero.marra@ucl.ac.uk