R: Plot Levels of a Variable in a Colour-Coded Map

ColorMap {RgoogleMaps} | R Documentation

## Plot Levels of a Variable in a Colour-Coded Map

### Description

Plot Levels of a Variable in a Colour-Coded Map

### Usage

    ColorMap(values, map = NULL, polys = NULL, log = FALSE, nclr = 7,
        include.legend = list(TRUE), round = 3, brks = NULL, legend = NULL,
        location = "topright", rev = FALSE, alpha = 0.5, GRAY = FALSE,
        palette = c("YlOrRd", "RdYlGn", "Spectral")[1], textInPolys = NULL,
        ...)

### Arguments

`values` | variable to plot
`map` | map object
`polys` | an object of class SpatialPolygons (See SpatialPolygons-class
`log` | boolean of whether to plot values on log scale
`nclr` | number of colour-levels to use
`include.legend` | boolean of whether to include legend
`round` | number of digits to round to in legend
`brks` | if desired, pre-specified breaks for legend
`legend` | if desired, a pre-specified legend
`location` | location of legend
`rev` | boolean of whether to reverse colour scheme (darker colours for smaller values)
`alpha` | alpha value of colors
`GRAY` | boolean: if TRUE, use gray scale instead
`palette` | palette to choose from RColorBrewer
`textInPolys` | text to be displayed inside polygons. This can be a column names for values
`...` | extra args to pass to `PlotPolysOnStaticMap`

### Author(s)

Markus Loecher

### Examples

      if (interactive()){
      data("NYleukemia", envir = environment())
      population <- NYleukemia$data$population
      cases <- NYleukemia$data$cases
      mapNY <- GetMap(center=c(lat=42.67456,lon=-76.00365), destfile = "NYstate.png",
                      maptype = "mobile", zoom=9)
      ColorMap(100*cases/population, mapNY, NYleukemia$spatial.polygon, add = FALSE,
               alpha = 0.35, log = TRUE, location = "topleft")
    }
      #ColorMap(100*cases/population, map=NULL, NYleukemia$spatial.polygon)

[Package RgoogleMaps version 1.4.1 Index]