rgraph6 (version 2.0-4)

is_graph6: Infer or test for graph6, sparse6, and digraph6 symbols

Description

Functions is_graph6(), is_sparse6()), and is_digraph6() test if elements of a character vector are valid symbols of particular type.

Function guess_format() tries to guess the type of the symbols used in x.

Usage

is_graph6(x)
is_sparse6(x)
is_digraph6(x)
guess_format(x)

Value

Logical vector of length equal to length(x) with TRUE if an element is a valid symbol and FALSE otherwise.

Function guess_format() returns a character vector of the same length as x with values "graph6", "sparse6", or "digraph6" depending on the type of symbol present, or NA if the symbol is unknown or matches more than one type.

Arguments

x

character vector

Examples

all(is_graph6(g6))
all(is_sparse6(s6))
all(is_digraph6(d6))

# Vector mixing graphs in various formats
x <- g6
x[seq(2, 20, by = 3)] <- s6[seq(2, 20, by = 3)]
x[seq(3, 20, by = 3)] <- d6[seq(3, 20, by = 3)]
guess_format(x)