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covartech / PRT

Pattern Recognition Toolbox for MATLAB
http://covartech.github.io/
MIT License
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Trouble with prtClassGlrt #25

Closed mridulaKassel closed 10 years ago

mridulaKassel commented 10 years ago

I am trying to classify a data set based on the observations given in the snapshot. However, after repeated trials using a combination of prtPreProcPca and prtClassGlrt, the ROC remains around 0.5 which is seriously no good. If any pointers could be provided on how to improve the AUC , I would be thankful. bildschirmfoto 2014-01-20 um 12 22 39

kennethmorton commented 10 years ago

This really isn't a problem with prtClassGlrt or the PRT at all. This appears to be an issue of poor separability of your data. From the scatter plot it appears that there is very little difference between your two classes. I suggest that you explore different pre-processing and feature selection approaches to get a feature space with better separability. Any classifier will have difficulty with the feature space shown in the image. Good luck.