Filter query results by a subpart value — Where • acsets

Filter query results by a subpart value

Usage

Where(query, f, op, value)

Arguments

query: An acset_query object from From().
f: Character: morphism or attribute name.
op: A comparison function (e.g. ==, <).
value: The value to compare against.

Value

The filtered acset_query object.

Examples

sch <- BasicSchema(
  obs = c("V"),
  attrtypes = c("Name"),
  attrs = list(attr_spec("name", "V", "Name"))
)
g <- ACSet(sch)
add_parts(g, "V", 3, name = c("Alice", "Bob", "Carol"))
#> [1] 1 2 3
From(g, "V") |> Where("name", `==`, "Bob") |> Select("name")
#>   id name
#> 1  2  Bob