2. Vertex selector constructors

2. Vertex selector constructors

2.1. igraph_vs_all — Vertex set, all vertices of a graph.
2.2. igraph_vs_adj — Adjacent vertices of a vertex.
2.3. igraph_vs_nonadj — Non-adjacent vertices of a vertex
2.4. igraph_vs_none — Empty vertex set.
2.5. igraph_vs_1 — Vertex set with a single vertex.
2.6. igraph_vs_vector — Vertex set based on a vector.
2.7. igraph_vs_vector_small — Create a vertex set by giving its elements.
2.8. igraph_vs_seq — Vertex set, an interval of vertices.

Vertex selectors are created by vertex selector constructors, can be instantiated with igraph_vit_create(), and are destroyed with igraph_vs_destroy().