Yes, there is. The fitcecoc function in the Statistics Toolbox:

http://www.mathworks.com/help/stats/fitcecoc.html

thanks 

Multi Class SVM

by Cody

Cody

1 file

371 downloads

3.84615

07 Dec 2012

Model and classify training/test data sets into more than 2 classes with SVM.

multisvm(TrainingSet,GroupTrain,TestSet)

function [result] = multisvm(TrainingSet,GroupTrain,TestSet)

%Models a given training set with a corresponding group vector and

%classifies a given test set using an SVM classifier according to a

%one vs. all relation.

%

%This code was written by Cody Neuburger [email protected]

%Florida Atlantic University, Florida USA

%This code was adapted and cleaned from Anand Mishra's multisvm function

%found at http://www.mathworks.com/matlabcentral/fileexchange/33170-multi-class-support-vector-machine/

u=unique(GroupTrain);

numClasses=length(u);

result = zeros(length(TestSet(:,1)),1);

%build models

for k=1:numClasses

%Vectorized statement that binarizes Group

%where 1 is the current class and 0 is all other classes

G1vAll=(GroupTrain==u(k));

models(k) = svmtrain(TrainingSet,G1vAll);

end

%classify test cases

for j=1:size(TestSet,1)

for k=1:numClasses

if(svmclassify(models(k),TestSet(j,:)))

break;

end

end

result(j) = k;

end

Thanks Dr.Mohiy

Yes, there is, you can see this pointer :

http://www.support-vector-machines.org/SVM_soft.html

I have used this function to classify 20 classes. but its not getting expected result.. its shows only one class its unable to group rest more classes.

Dear Mohamed Adel Hammad

can i ask about how did you apply SVM on ECG signal in steps plz ??

i think it will help

Hello Salma,

I just see your question, but I think it's too late sorry for that. If you still need it I can help you.

Hello Dr. Emad

Thanks for help but I think that no builtin function in matlab called multisvm.

matlab function

now toolbox are avilable

Classification Learner app is good for this

http://www.mathworks.com/help/stats/support-vector-machine-classification.html

https://fr.mathworks.com/help/stats/fitcecoc.html

use fitcecoc fun for multi class svm