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

In AndySouth/rworldmap: Mapping Global Data

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
)

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

Details

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

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.

Author(s)

andy south #@importFrom maptools readAsciiGrid

See Also

aggregateHalfDegreeGridToCountries

Examples

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

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

AndySouth/rworldmap documentation built on Sept. 3, 2023, 3:46 a.m.