MATLAB interface for SVM-Light Icon

MATLAB interface for SVM-Light

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3.0 Stars (2)
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Description

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.

MATLAB interface for SVM-Light Web Site

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User Reviews

  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    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.

    Posted 07/29/2014
  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    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.

    Posted 08/07/2012
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Additional Project Details

Intended Audience

Science/Research

Programming Language

MATLAB, C

Registered

2008-01-22

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