1. A method using a computer having a hardware processor to classify a plurality of users in social media, the method comprising the steps of: generating, using the hardware processor, a content feature vector for each of a portion of users of the plurality of users on the basis of content associated with the portion of users; generating, using the hardware processor, a plurality of clusters on the basis of the content feature vectors; mapping, using the hardware processor the portion of users to the plurality of clusters on the basis of the content feature vectors; generating, using the hardware processor, a first profile feature vector for each of the plurality of clusters on the basis of profiles associated with corresponding users within the portion of users mapped to each cluster; and classifying, using the hardware processor, each of the other users excluding the portion of users into the plurality of clusters on the basis of profiles associated with the other users and the first profile feature vectors, and outputting, via display device associated with said computer, clusters corresponding to the classified other users.