PT Journal
AU Jaume Gibert
   Ernest Valveny
   Horst Bunke
TI Feature Selection on Node Statistics Based Embedding of Graphs
SO Pattern Recognition Letters
JI PRL
PY 2012
BP 1980–1990
VL 33
IS 15
DI 10.1016/j.patrec.2012.03.017
DE Structural pattern recognition; Graph embedding; Feature ranking; PCA; Graph classification
AB Representing a graph with a feature vector is a common way of making statistical machine learning algorithms applicable to the domain of graphs. Such a transition from graphs to vectors is known as graphembedding. A key issue in graphembedding is to select a proper set of features in order to make the vectorial representation of graphs as strong and discriminative as possible. In this article, we propose features that are constructed out of frequencies of node label representatives. We first build a large set of features and then select the most discriminative ones according to different ranking criteria and feature transformation algorithms. On different classification tasks, we experimentally show that only a small significant subset of these features is needed to achieve the same classification rates as competing to state-of-the-art methods.
ER