Hello, thank you very much for your reply, I use your codes to get the excatly data that I want and I really appreciate it. Now I have a new requirement, which is to build a directed patent citation network similar to the previous one. The purpose is to obtain an asymmetric matrix of 66*66. The node...

Thank you for your reply. I've looked up a lot of papers on your question and It's clear now. I want to build a non-directed patent network where the nodes are 65 specific countries and the links are the number of patent collaborations between different countries. And my network is based only on app...

I want to search for patents for cooperation in 65 countries (with a list of specific countries), the specific time is 2014 to 2019,so as to establish a patent cooperation network, I want to get these data and build a 65 * 65 matrix，but I don’t know how to write the code. I hope that someone can hel...