mex-svm is a set of patches against SVM-Light to compile into "mex" libraries and enable fast Support Vector Machine evaluation from within MATLAB.
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GNU General Public License version 2.0 (GPLv2)Follow MATLAB interface for SVM-Light
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Works as described after running the provided patch. The first couple of times I attempted to use it, MATLAB closed unexpectedly without error. After these attempts, it has worked without issue since. Thanks for the well-written interface.
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The author correctly recognizes that Matlab has a native Compressed Sparse Column (CSC) format for sparse matrices. He assumes that users prefer to store data in row format, so each pattern is a row of the data matrix; but this matrix is stored as a CSC matrix. The underlying data structure for SVM Light uses a sparse data structure for each pattern. To convert between representations, a matrix transpose is needed. This author uses the worst possible algorithm for this (in mexcommon.c)---it takes m x n time! There are much faster and better ways to do this, like just using Matlab's built-in, highly-optimized transpose method. If you have dense data, this code will work fine for you. If you have sparse data, you'll be mostly out of luck. There's a lot of good code here, but I had to completely rewrite mexcommon.c.