1. A method, comprising: processing a stream of data vectors comprising a first group of data vectors and a second group of data vectors corresponding to different portions of the stream of data vectors; generating a visualization from the first group of the data vectors; determining a first set of values corresponding to one or more eigenvectors for a matrix defined with the first group of the data vectors; and with a computer, projecting each member of the second group of the data vectors onto the visualization as a function of the first set of values.