PLSA

pLSA: Probabilistic Latent Semantic Analysis of Imaging Mass Spectrometry Data in MATLAB

M. Hanselmann, M. Kirchner, Bernhard Renard, and Fred A. Hamprecht

This package contains MATLAB code to perform a probabilistic Latent Semantic Analysis of Imaging Mass Spectrometry Data. In contrast to other unsupervised methods like Principal Component Analysis or Independent Component Analysis this method accounts for the non-negativity of mass spectra. A simple peak-picker based on local maximum detection is included for feature extraction.

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