Nothing
## ----setup, include = FALSE-------------------------------------------------------------------------------------------------------------------------
knitr::opts_chunk$set(
collapse = TRUE,
comment = "#>"
)
## ---------------------------------------------------------------------------------------------------------------------------------------------------
library(FSelectorRcpp)
data <- data.frame(
y = factor(c("A", "A", "A", "B", "B", "A")),
x = c(1.2, 2.1, 4.1, 7.3, 8.2, 3.2),
z = c("x", "x", "y", "y", "y", "x"),
stringsAsFactors = FALSE)
discretize(data, y ~ .)
## ---------------------------------------------------------------------------------------------------------------------------------------------------
library(FSelectorRcpp)
data <- data.frame(
y = factor(c("A", "A", "A", "B", "B", "A")),
x = c(1.2, 2.1, 4.1, 7.3, 8.2, 3.2),
z = c("x", "x", "y", "y", "y", "x"),
int = as.integer(c(1, 1, 1, 2, 2, 1)),
uniqueInt = as.integer(c(10, 20, 11, 22, 25, 11)),
stringsAsFactors = FALSE)
# default (integers are discretized)
discretize(data, y ~ .)
# discIntegers is set to FALSE - integers are left as is.
discretize(data, y ~ ., discIntegers = FALSE)
## ---------------------------------------------------------------------------------------------------------------------------------------------------
can_discretize <- function(x, treshold = 0.9) {
is.integer(x) &&
(length(unique(x)) / length(x) > treshold)
}
can_discretize(1:10)
can_discretize(rnorm(10))
can_discretize(as.integer(c(rep(1,10), rep(2, 10))))
library(dplyr)
set.seed(123)
dt <- tibble(
x = 1:20,
y = rnorm(20),
z = as.integer(c(rep(1,10), rep(2, 10)))
)
glimpse(dt)
glimpse(dt %>% mutate_if(can_discretize, as.numeric))
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