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Feature Analysis

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Feature Analysis

by Iftekhar Tanveer

 

09 Mar 2010 (Updated 17 Oct 2011)

This program analyzes an arff file (weka)

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Description

This program uses LDA and PCA to analyze features from weka arff file. The projection on PCA and LDA space visualizes the goodness of the features. If the features are good enough to be classified well they should have some kind of separation when projected on a 1 dimensional LDA or a 3 dimensional PCA space.

This MATLAB script assumes that the arff file has 2 classes named "Positive" and "Negative". However, it can be extended into any amount of class labels.
MATLAB release MATLAB 7.8 (R2009a)
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arff(3), feature selection(4), lda(2), pca, visualization, weka
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Comments and Ratings (2)
28 Jul 2011 Ahmed Rabbi

% Eishob ajgubi jinish shudhu MATLAB ei shombhob
10 Sep 2010 Przemo :)

Hye,
I have a question about Regu parameter that is optional in LDA procedure. I receive smaller classifiaction error (smaller about 10%) when I set it to 1. Why does the paraemter influence the output result so much ?
Thanks a lot !
Updates
07 Jun 2010

I've made the LDA space from 1D to 2D. Also included some sample arff files to read.
07 Jun 2010

Just changed the title
17 Oct 2011

Coded for more general use

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