Is it possible to have control on C parameter of SVM in Matlab ?

n
n
2011 2 15
1 个回答
4 次查看（30 天）

0 个投票

Hi,
I have seen the following question and answer:
http://mathforum.org/kb/message.jspa?messageID=3735688&tstart=0
but it seems to be too complicated! are there any other ways perhaps in newer versions of bioinoformatic toolbox to have control on C parameter of SVM? or somehow have control on how SVM parameters are being optimized?
Thanks

请先登录，再回答此问题。

回答（1 个）

n
n 2011-2-17

0 个投票

Here is an example of using 'QuadProg_Opts' option in svmtrain:
myoption = optimset('PrecondBandWidth',2);
% this is the ub parameter of quadprog I guess
svmStruct =svmtrain(train_data,train_label,'Kernel_Function','rbf','RBF_Sigma', 0.5,'QuadProg_Opts', myoptions);
But the C value seem to be relative to box constrain as used in the example of svmtrain:
svmStruct = svmtrain(data(train,:),groups(train),...
'showplot',true,'boxconstraint',1e6);

类别

在 帮助中心 和 File Exchange 中查找有关 MATLAB 的更多信息

标签

提问:

n
n
2011-2-15

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by