[SOUND] Hi, in this session, I'm going to give you a brief overview of user insights and clustering. Usually, users may have some interesting insights or views. User may like to interact with the clustering process, to influence the final results of clustering. One interesting one is visual insights, because a picture is worth a thousand words. Human eyes are actually powerful, high-speed processors. Because they are also linked with rich knowledge base. So, a human can provide a lot of intuitive insights whether this clustering result is good or something they desired is not achieved based on the current clustering result. Okay, there's usually user's good to one or two dimensional, at most 3D, they may be able to find clusters. Their algorithms, for example, High D eyes, how to visualize high dimensional clusters. The second one is semi-supervised insights, that means user may have certain insights or intention on the clustering process. They may like to pass their insights to the system to influence the results of the clustering. For example, user may provide some seeding. That means you can provide a number of labeled examples or some approximate representation of the categories of interest. Then you may like the clustering process to take your insight to do some desired clustering. The third one is multi-view and ensemble-based insights. So-called multi-view clustering is different clustering may generate different perspectives. The multiple clustering, you can ensemble them together to provide more robust solution. Finally, a very important one is validation-based insight. That means, you may want to evaluate the quality of the clusters generated based on certain validation methods. For example, you may use case studies or you may provide specific measures, or you may provide some preexisting labels. All of these, we're going to discuss in detail in some chapter. Finally, I provide a few reference books. And especially the chapter By Charu Aggarwal. An Introduction to Clustering Analysis is a very nice introduction on general ideas of clustering analysis. Thank you. [MUSIC]
