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Exercise

Using randomizations to assess assortativity

In this exercise you will determine how likely the observed assortativity in the friendship network is given the genders of vertices by performing a randomization procedure. You will randomly permute the gender of vertices in the network 1000 times and recalculate the assortativity for each random network.

Instructions

100 XP
  • Use assortativity() to calculate the assortativity of the graph object g1 based on gender using the object values calculated in the previous exercise, and assign this to the object observed.assortativity.
  • Inside the for loop calculate the assortativity of the network g1 using assortativity() while randomly permuting the object values each time with sample().
  • Plot the distribution of assortativity values from this permutation procedure using hist() and add a red vertical line for the original g1 network observed assortativity value that is stored in observed.assortativity.