i want to compute modularity Q "a function used in community detection in social network"

I make some changes to this algorithm by adding a new node and putting it in a lone community

,but i can't compute new_modularity after this changes

this is the algorithm "danon" with changes

[Walter Roberson]

Do you get an error message? If so, what error and with what traceback?

[mai saad]

No, i want to complete the program to get new modularity ,but i can't

[Walter Roberson]

That sounds like a research question rather than a MATLAB question.

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer