Peter Mattoon
Question 4 Functions
· closeness(): This function computes the closeness centrality or how many steps to get from one node to every other node
· head(): This function only allows the first few results to be returned by the function contained in its parenthesis
· is.weighted(): This function returns a true or false response to the question of whether the graph being tested is a weighted graph or not.
Question 5
· Ego: the head function is also used to keep the results to a manageable size
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