num2fac: Transform a numerical vector to a factor

In tabplot: Tableplot, a Visualization of Large Datasets

Description

Transform a numerical vector from class POSIXt or Date to a factor.

Usage

num2fac(num, method = "pretty", num_scale = "auto", n = 0,
  brks = NA)

Arguments

num	numeric vector
method	"pretty" intervals are determined by the base function pretty "kmeans" the method intervals are determined by the method kmeans where n clusters (i.e. intervals) are found "fixed" determines the intervals by the argument brks "discrete" the unique values in num are mapped one to one to the levels of the new factor vector)
num_scale	"auto" used scale is determined automatically "lin" num is directly fed to the method pretty or kmeans "log" a logarithmic transformation of num is fed to the method pretty or kmeans
n	the (desired) number of levels. n=0 means automatic
brks	breaks that determine the levels (only required when method="fixed")

Value

A factor vector

Note

This function is still in development stage, and can be improved and optimized. ff vectors are not implemented yet

See Also

datetime2fac

Examples

require(ggplot2)
data(diamonds)

diamonds$price2 <- num2fac(diamonds$price)

tableplot(diamonds)

tabplot documentation built on Sept. 17, 2019, 5:04 p.m.