possible_linkages: Generate Possible Linkages

In glyrepr: Representation for Glycan Compositions and Structures

Generate Possible Linkages

Description

Given an obscure linkage format (having "?", e.g. "a2-?"), this function generates all possible linkages based on the format. See valid_linkages() for details.

The ranges of possible anomers, first positions, and second positions can be specified using anomer_range, pos1_range, and pos2_range.

Usage

possible_linkages(
  linkage,
  anomer_range = c("a", "b"),
  pos1_range = 1:2,
  pos2_range = 1:9,
  include_unknown = FALSE
)

Arguments

linkage	A linkage string.
anomer_range	A character vector of possible anomers. Default is c("a", "b").
pos1_range	A numeric vector of possible first positions. Default is 1:2.
pos2_range	A numeric vector of possible second positions. Default is 1:9.
include_unknown	A logical value. If TRUE, "?" will be included. Default is FALSE.

Value

A character vector of possible linkages.

See Also

has_linkages(), remove_linkages(), valid_linkages()

Examples

possible_linkages("a2-?")
possible_linkages("??-2")
possible_linkages("a1-3")
possible_linkages("a?-?", pos1_range = 2, pos2_range = c(2, 3))
possible_linkages("?1-6", include_unknown = TRUE)

glyrepr documentation built on Sept. 22, 2026, 5:09 p.m.