rworldmap (version 1.01)

mapBubbles: function to produce bubble plots on a map, size and colour determined by attribute data

Description

The function will produce a map with bubbles (circles) centred on country centroids (or other chosen points). Bubbles can be sized and coloured according to specified attribute values.

Usage

mapBubbles(dF = ""
          , nameX = "longitude"
          , nameY = "latitude"
          , nameZSize = ""
          , nameZColour = ""
          
          , fill = TRUE
          , pch = 21
          , symbolSize = 1
          , maxZVal = NA          
          
          , main = nameZSize
          
          , numCats = 5
          , catMethod = "categorical"
          , colourPalette = "heat"
          
          , mapRegion = "world"
          , borderCol = "grey"
          , oceanCol = NA
          , landCol = NA
              
          , addLegend = TRUE
          , legendBg = "white"
          , legendVals = ""
          , legendPos = "bottomright"
          , legendHoriz = FALSE
          , legendTitle = nameZSize
          , addColourLegend = TRUE
          , colourLegendPos = "bottomleft"
          , colourLegendTitle = nameZColour
          , add = FALSE
          , plotZeroVals = TRUE
          , ...)

Arguments

dF

data frame or SpatialPolygonsDataFrame

nameX

name of column containing the X variable (longitude), not needed if dF is a SpatialPolygonsDataFrame

nameY

name of column containing the Y variable (lattitude), not needed if dF is a SpatialPolygonsDataFrame

nameZSize

name of column containing numeric variable to set symbol size

nameZColour

name of column containing variable to set symbol colour

fill

whether or not to fill symbols TRUE/FALSE

pch

symbol type, default of 21 for circles, will work with other filled symbol types e.g. 22=square, 23=diamond, 24=triangle

symbolSize

multiplier of default symbol size

maxZVal

the attribute value corresponding to the maximum symbol size, this can be used to set the scaling the same between multiple plots

main

title for the map, set to nameZSize by default

numCats

number of categories to put the data in, may be modified if this number is incompatible with the catMethod chosen

catMethod

method for categorisation of data "pretty", "fixedWidth", "diverging", "logfixedWidth","quantiles","categorical", or a numeric vector defining breaks

colourPalette

a string describing the colour palette to use, choice of :

{="palette" for the current palette} {a vector of valid colours, e.g. =c('red','white','blue') or output from RColourBrewer} <

Value

• currently doesn't return anything

item

• mapRegion
• borderCol
• oceanCol
• landCol
• addLegend
• legendBg
• legendVals
• legendPos
• legendHoriz
• legendTitle
• addColourLegend
• colourLegendPos
• colourLegendTitle
• add
• plotZeroVals
• ...

Details

By default separate legends are added fro symbol size and colouring on either side of the plot, these can be modified by altering legend parameters.

Examples

mapBubbles()
#square symbols
mapBubbles(pch=22)

mapBubbles(dF=getMap(), nameZSize="POP_EST", nameZColour="GEO3")

#change colour
mapBubbles(dF=getMap(), nameZSize="POP_EST", nameZColour="GEO3"
          ,colourPalette='rainbow', oceanCol='lightblue', landCol='wheat') 


data("countryExData",envir=environment(),package="rworldmap")
sPDF <- joinCountryData2Map(countryExData,joinCode = "ISO3"
                           ,nameJoinColumn = "ISO3V10")
                           
mapBubbles(sPDF, nameZSize="POP_EST",nameZColour="BIODIVERSITY"
          ,colourPalette='topo',numCats=5,catMethod="quantiles")