On LAMDA clustering method based on typicality degree and intuitionistic fuzzy sets.

•The paper proposes GTD and IGAD functions to improve the LAMDA algorithm.•GTD and IGAD functions are mixed by an interpolation function called TIGAD.•Methods 6 and 7 generated the best results for study cases.•Methods 6 and 7 generated a good balance of the number of classes and PE values.•The proposed method improved the classes generation and the quality of clustering.