Incident query: find parts whose subpart equals a given value

Incident query: find parts whose subpart equals a given value

Usage

incident(x, ...)

Arguments

x

An ACSet

...

Arguments passed to methods.

Examples

sch <- BasicSchema(
  obs = c("E", "V"),
  homs = list(hom("src", "E", "V"), hom("tgt", "E", "V"))
)
g <- ACSet(sch, index = c("src", "tgt"))
add_parts(g, "V", 3)
#> [1] 1 2 3
add_parts(g, "E", 2, src = c(1L, 1L), tgt = c(2L, 3L))
#> [1] 1 2
# Which edges have source vertex 1?
incident(g, 1L, "src")
#> [1] 1 2