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Old 09-03-2012, 09:32 PM
munchkin munchkin is offline
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Default Signficance Of High Number Of Iterations

In the context of solving the optimization problem exactly what is the significance of a relatively higher number of iterations prior to returning an alpha vector? Does this mean that the data set is ill-conditioned in some way for the given C value? The iteration count varies widely during each of the runs for the cross validation. Thanks for your attention.
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Old 09-06-2012, 04:29 PM
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htlin htlin is offline
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Default Re: Signficance Of High Number Of Iterations

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Originally Posted by munchkin View Post
In the context of solving the optimization problem exactly what is the significance of a relatively higher number of iterations prior to returning an alpha vector? Does this mean that the data set is ill-conditioned in some way for the given C value? The iteration count varies widely during each of the runs for the cross validation. Thanks for your attention.
Yes, it means that the data set is ill-conditioned. Usually the physical meaning is that the rank of \mathrm{Q} is not enough (making it hard to separate the examples) and C is too large (insisting on separating). Hope this helps.
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Old 09-09-2012, 03:25 PM
munchkin munchkin is offline
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Default Re: Signficance Of High Number Of Iterations

Yes. That is very helpful. Thanks!
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