Q: How could I use MATLAB interface for parameter selection?

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Q: How could I use MATLAB interface for parameter selection? One can do this by a simple loop. See the following example:   bestcv = 0; for log2c = -1:3,   for log2g = -4:1,     cmd = ['-v 5 -c ', num2str(2^log2c), ' -g ', num2str(2^log2g)];     cv = svmtrain(heart_scale_label, heart_scale_inst, cmd);     if (cv >= bestcv),       bestcv = cv; bestc = 2^log2c; bestg = 2^log2g;     end     fprintf('%g %g %g (best c=%g, g=%g, rate=%g)\n', log2c, log2g, cv, bestc, bestg, bestcv);   end end You may adjust the parameter range in the above loops.

　　http://www.csie.ntu.edu.tw/~cjlin/libsvm/faq.html