ft_filter_pos: Remove Factor Levels with Specific Characters at Specified...

In fctutils: Advanced Factor Manipulation Utilities

Remove Factor Levels with Specific Characters at Specified Positions

Description

Removes factor levels where a specified character appears at specified positions within the levels.

Usage

ft_filter_pos(
  factor_vec,
  positions = NULL,
  char,
  case = FALSE,
  remove_na = TRUE,
  invert = FALSE,
  .return = FALSE
)

Arguments

factor_vec	A factor vector from which levels will be removed.
positions	A vector of positive integers indicating the character positions to check.
char	A single character string specifying the character to look for.
case	Logical. Should the character matching be case-sensitive? Default is FALSE.
remove_na	remove NA from the output? Default is TRUE.
invert	logical. If TRUE return indices or values for elements that do not match.
.return	logical. If TRUE return TRUE or FALSE instead of element.

Value

A factor vector with levels removed where the specified character appears at the specified positions.

Author(s)

Kai Guo

Examples

# Example factor vector
factor_vec <- factor(c('apple', 'banana', 'apricot', 'cherry', 'date', 'fig', 'grape'))

# Remove levels where 'a' appears at position 1
ft_filter_pos(factor_vec, positions = 1, char = 'a')

# Remove levels where 'e' appears at positions 2 or 3
ft_filter_pos(factor_vec, positions = c(2, 3), char = 'e')

# Case-sensitive removal
factor_vec_case <- factor(c('Apple', 'banana', 'Apricot', 'Cherry', 'Date', 'Fig', 'grape'))
ft_filter_pos(factor_vec_case, positions = 1, char = 'A', case = TRUE)

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