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Old 06-09-2013, 02:31 PM
marek marek is offline
Join Date: Apr 2013
Posts: 31
Default Re: Q14 - on using LIBSVM : C parameter?

Originally Posted by bargava View Post
I am trying to use LIBSVM to do this. And for using this, a value for C should be specified.

Should C be assigned an extremely large arbitrary value (say: 1e+10)? Would that be similar to implementing a hard margin SVM?
I tried 10^3 first and then increased the exponent until the output stopped changing.

Edit: I seem to recall that 1000 was considered a good rule of thumb for a hard margin. But I found from practice that in this question it was still insufficient.
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