cut function for (appr.) equal intervals

This function uses cut to make categories based on approximately equal number of bins

Usage

cut_equal(x, n, type = 1, ntries = 1000)

Arguments

x: the vector that should be cut into equal bins
n: the number of bins that should be used
type: the type of algorithm to be used (see details)
ntries: number of samples/tries for type 2

Value

a character vector with the categories/bins

Details

Generating equal bins can be quite difficult. There are multiple ways of assessing if bins are equal. This function provides a method based on quantiles (type=1) or a method based on sampling proposed by M. Ruppert (type=2). In general type 1 is faster but less accurate, while type 2 is slower and more accurate (in case of a reasonable ntries)

Author

Richard Hooijmaijers

Examples


 table(cut_equal(1:20,5))
#> 
#>     1+2+3+4 13+14+15+16 17+18+19+20     5+6+7+8  9+10+11+12 
#>           4           4           4           4           4