The Inf-FS is a graph-based method which exploits the convergence properties of the power series of matrices to evaluate the importance of a feature with respect to all the other ones taken together. Indeed, in the Inf-FS formulation, each feature is mapped on an affinity graph, where nodes represent features and weighted edges relationships between them. Each path of a certain length l over the graph is seen as a possible selection of features. Therefore, varying these paths and letting them tend to an infinite number permits the investigation of the importance of each possible subset of features. The Inf-FS assigns a final score to each feature of the initial set; where the score is related to how much the given feature is a good candidate regarding the classification task. Therefore, ranking in descendant order the outcome of the Inf-FS allows us to perform the subset feature selection throughout a model selection stage to determine the number of features to be selected.
Reference : Infinite Feature Selection
Link Paper :http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7410835
Giorgio (2021). Infinite Feature Selection (https://www.mathworks.com/matlabcentral/fileexchange/54763-infinite-feature-selection), MATLAB Central File Exchange. Retrieved .
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