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I am sharing with the world my implementation of spectral clustering in MATLAB. Please read the readme.txt file first. The main functionality includes the spectral clustering method (spectralCluster.m) and a cluster validity index for graph clustering (graphIndex.m).

If you come up with error, please contact Yifeng Li by email: yifeng{DOT}li{DOT}cn{AT}gmail{DOT}com.

You may be also interested in my

Non-Negative Matrix Factorization toolbox at https://sites.google.com/site/nmftool,

Sparse Representation toolbox at https://sites.google.com/site/sparsereptool,

Regularized Linear Models and Kernels toolbox: https://sites.google.com/site/rlmktool,

Probabilistic Graphical Models toolbox at https://sites.google.com/site/pgmtool,

Spectral Clustering toolbox at https://sites.google.com/site/speclust.