ColorMap function

Plot Levels of a Variable in a Colour-Coded Map

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 (0){
    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)