
126 Text Mining and Visualization: Case Studies Using Open-Source Tools
These are applied to the User Report: column. Performing unsupervised learning on textual
data may be considered as data exploration [11] depending on the context of the project.
It is assumed that the user is familiar with Clustering. PCA may be less familiar. In
structured data, one of the challenges is understanding the interaction between multiple
variables. Many times, pairwise ...