ft_substr_freq: Reorder Factor Levels Based on Substring Frequency

In fctutils: Advanced Factor Manipulation Utilities

Reorder Factor Levels Based on Substring Frequency

Description

Reorders the levels of a factor vector based on the frequency of substrings extracted from the data.

Usage

ft_substr_freq(
  factor_vec,
  start_pos = NULL,
  end_pos = NULL,
  case = FALSE,
  decreasing = TRUE,
  inplace = TRUE
)

Arguments

factor_vec	A factor vector whose levels are to be reordered.
start_pos	Positive integer. The starting position of the substring. If NULL, starts from the beginning.
end_pos	Positive integer. The ending position of the substring. If NULL, goes to the end of the string.
case	Logical. Should the substring comparison be case-sensitive? Default is FALSE.
decreasing	Logical. Should the ordering be decreasing by frequency? Default is TRUE.
inplace	Logical. If TRUE, returns a new factor vector with elements reordered to align with the new levels' order. If FALSE, returns a new factor vector with only the levels' order adjusted, leaving the data vector's elements' order unchanged. Defaults to FALSE.

Value

A factor vector with levels reordered based on the frequency of substrings.

Author(s)

Kai Guo

Examples

# Example factor vector with multi-byte characters
factor_vec <- factor(c('apple', 'banana', 'apricot', 'cherry', 'banana', 'banana', 'date'))
# Reorder from position 2 to end
ft_substr_freq(factor_vec, start_pos = 2)
factor_vec <- factor(c('apple', 'banana', 'apricot', 'cherry', 'banana', 'banana', 'date'))
ft_substr_freq(factor_vec, start_pos = 2, end_pos=3)

fctutils documentation built on Oct. 1, 2024, 1:07 a.m.