search for: atsameinst

dear all, thank you for reading. I have a dataset of artists and where and when they had an exhibition. I'd like to create an affiliation network in the form of matrix, telling me which aritist have been in the same at the same time. I manage to do it, but given that I have 96000 observation the program takes 30 months to complete. her what i have done. the data look like this Artist