strExtractAll: Extract all pattern occurances

In acidgenomics/AcidBase: Acid Genomics Base Functions

Extract all pattern occurances

Description

Uses gregexpr() and regmatches() internally.

Usage

strExtractAll(x, pattern, fixed = FALSE)

Arguments

x	character. Character vector. NA values are allowed.
pattern	character(1). Regular expression pattern. Evalutes with gregexpr() internally.
fixed	logical(1). If TRUE, pattern is a string to be matched as is. Otherwise, will match by regular expression.

Value

list. List of character vector extractions. Returns character(0L) for match failure, NA_character_ for NA.

Note

Updated 2023-09-25.

See Also

• gregexpr() , regmatches().

• stringi::stri_extract_all().

• stringr::str_extract_all().

• https://stringr.tidyverse.org/articles/from-base.html

Examples

object <- strExtractAll(
    x = c("apples x4", "bag of flour", "bag of sugar", "milk x2", NA),
    pattern = "[a-z]+"
)
print(object)

acidgenomics/AcidBase documentation built on Jan. 28, 2024, 2:59 a.m.