how to plot residual energy of cluster heads with respect to number of rounds

i need to check residual energy of cluster heads for every round and if the residual energy goes below energy threshold , we have to reselect the cluster head based on the highest residual energy. Please help me out to solve this problem.

[Walter Roberson]

How does this differ from https://www.mathworks.com/matlabcentral/answers/2037726-how-to-calculate-the-energy-consumption-of-cluster-head-for-every-round?s_tid=srchtitle ?