rwmGetClassBreaks {rworldmap} | R Documentation |
Internal function to set the numeric values for the breaks between data categories
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
[Package rworldmap version 1.3-8 Index]