rwmGetClassBreaks: Internal function to set the numeric values for the breaks...

In rworldmap: Mapping global data, vector and raster.

Description

Sets the values that determine how a vector of continuous data is classified into categories. Called by mapCountryData() and mapGriddedData()

Usage

rwmGetClassBreaks(dataColumn, catMethod, numCats, verbose=TRUE, midpoint=0)

Arguments

dataColumn	the data vector to be classified, must be numeric
catMethod	the method to use to classify the data into categories, choice of "pretty", "fixedWidth", "diverging", "logFixedWidth","quantiles","categorical" or a numeric vector defining breaks
numCats	number of categories to put the data in, may be overidden if not possible under some classification methods
verbose	whether to print information messages to console TRUE/FALSE
midpoint	the midpoint to use if catMethod='diverging', default=0

Value

A vector specifying the numeric breaks between data categories.

Author(s)

andy south and matthew staines

See Also

The classInt package

rworldmap documentation built on May 2, 2019, 4:50 p.m.