Determines whether a graph is set to be directed or not and returns a logical value to that effect.
a graph object of class
a logical value.
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# Create an empty graph; by default, new graphs # made by `create_graph()` are directed` graph <- create_graph() # Determine whether the graph is directed is_graph_directed(graph) #>  TRUE # Use the `set_graph_undirected()` function and # check again whether the graph is directed graph %>% set_graph_undirected() %>% is_graph_directed() #>  FALSE
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