What does this utility do?
This software is intended for interactive or offline exploratory data analysis.
What are feature vectors and why would one want to use them?
A feature vector in this context is an ordered collection of attributes from the main list. This can be used to select a subspace where a natural metric exists, i.e., the similarity of objects can be compared in a meaningful way. The feature vectors can be passed internally to pattern recognition algorithms or saved for external analysis. The order of the list is used in a feature vector (parallel coordinate) plot, that means it can be manipulated to sort the coordinates in some useful way.