In Section 3 you give a selection of references to index functions. I think here you could be even more selective and add a few words about why these ones are interesting (e.g. Friedman and Tukey was original proposal, LDA and PDA look for projections where clusters are separated...)
In Section 3 you give a selection of references to index functions. I think here you could be even more selective and add a few words about why these ones are interesting (e.g. Friedman and Tukey was original proposal, LDA and PDA look for projections where clusters are separated...)