igraph dfs may signal unreachable nodes with 0

* this still seems to be up in the air but at least some preparatory branches for igraph 2.0 use a 0 rather than NaN to signal unreachable nodes * see #517
natverse · Jan 31, 2024 · c6f6808 · c6f6808
1 parent 86ad05e
commit c6f6808
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/R/ngraph.R b/R/ngraph.R
@@ -504,6 +504,8 @@ prune_vertices<-function(x, verticestoprune, invert=FALSE, ...) {
   if(invert) {
     nvertices=igraph::vcount(g)
     verticestoprune=setdiff(seq_len(nvertices), verticestoprune)
+  } else {
+    verticestoprune=setdiff(verticestoprune, 0)
   }
   dg=igraph::delete_vertices(g, verticestoprune)
   # delete_vertices will return an igraph