mapHalfDegreeGridToCountries: Maps user half degree gridded data at country level by first aggregating.

Description

Maps user half degree gridded data at country level by first aggregating.

Usage

mapHalfDegreeGridToCountries(inFile = "", aggregateOption = "sum",
  nameCountryColumn = "", suggestForFailedCodes = FALSE, projection = NA,
  mapResolution = "low", numCats = 7, xlim = c(-160, 160), ylim = c(-80,
  90), mapRegion = "world", catMethod = "quantiles",
  colourPalette = "heat", addLegend = TRUE, lwd = 0.5)

Value

invisibly returns a list containing the data and main options used for the map, the list can be passed to addMapLegend along with additional options to allow greater flexibility in legend creation.

Arguments

inFile: either a gridascii filename or an sp SpatialGridDataFrame object specifying a global half degree grid dataset, if none specified an internal example data is used
aggregateOption: how to aggregate the data ('sum','mean','min','max')
nameCountryColumn: optional name of column containing country names (used in reporting of success/failure)
suggestForFailedCodes: T/F whether you want system to suggest for failed codes NOT YET WORKING
projection: deprecated june 2012
mapResolution: options low, medium, only for projection='none' initially
numCats: number of categories, may be overided e.g. if catMethod ='pretty'
xlim: map extents c(west,east), can be overidden by mapRegion
ylim: map extents c(south,north), can be overidden by mapRegion
mapRegion: 'world','africa','oceania','eurasia','uk' sets map extents, overrides we,ea etc.
catMethod: method for categorisation of data "pretty", any vector defining breaks, "fixedWidth","quantiles"
colourPalette: "heat","white2Black","palette":for current palette
addLegend: whether to add a legend or not T/F
lwd: line width for country borders

Author

andy south

Details

Aggregates half degree gridded data to countries using the option specified in 'aggregateOption' then maps at a country level.

Examples

Run this code



data(gridExData,envir=environment(),package="rworldmap")
gridExData <- get("gridExData")
mapHalfDegreeGridToCountries(gridExData)             

#different aggregate option
mapHalfDegreeGridToCountries( gridExData, aggregateOption="mean" )

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