| fisher {insurancerating} | R Documentation |
Fisher's natural breaks classification
Description
The function provides an interface to finding class intervals for continuous numerical variables, for example for choosing colours for plotting maps.
Usage
fisher(vec, n = 7, diglab = 2)
Arguments
vec |
a continuous numerical variable |
n |
number of classes required (n = 7 is default) |
diglab |
number of digits (n = 2 is default) |
Details
The "fisher" style uses the algorithm proposed by W. D. Fisher (1958) and discussed by Slocum et al. (2005) as the Fisher-Jenks algorithm. This function is adopted from the classInt package.
Value
Vector with clustering
Author(s)
Martin Haringa
References
Bivand, R. (2018). classInt: Choose Univariate Class Intervals. R package version 0.2-3. https://CRAN.R-project.org/package=classInt
Fisher, W. D. 1958 "On grouping for maximum homogeneity", Journal of the American Statistical Association, 53, pp. 789–798. doi: 10.1080/01621459.1958.10501479.