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Dear all group members:
I have some problem while using svmtrain() or svmclassify()
gives the following example:
when i select and run code the following error/message come up/
% Load the data and select features for classification
data = [meas(:,1), meas(:,2)];
% Extract the Setosa class
groups = ismember(species,'setosa');
% Randomly select training and test sets
[train, test] = crossvalind('holdOut',groups);
cp = classperf(groups);
% Use a linear support vector machine classifier
svmStruct = svmtrain(data(train,:),groups(train),'showplot',true);
% Add a title to the plot
title(sprintf('Kernel Function: %s',...
% Classify the test set using svmclassify
classes = svmclassify(svmStruct,data(test,:),'showplot',true);
% See how well the classifier performed
Usage: model = svmtrain(training_label_vector, training_instance_matrix, 'libsvm_options');
-s svm_type : set type of SVM (default 0)
0 -- C-SVC
1 -- nu-SVC
2 -- one-class SVM
3 -- epsilon-SVR
4 -- nu-SVR
-t kernel_type : set type of kernel function (default 2)
0 -- linear: u'*v
1 -- polynomial: (gamma*u'*v + coef0)^degree
2 -- radial basis function: exp(-gamma*|u-v|^2)
3 -- sigmoid: tanh(gamma*u'*v + coef0)
4 -- precomputed kernel (kernel values in training_instance_matrix)
-d degree : set degree in kernel function (default 3)
-g gamma : set gamma in kernel function (default 1/k)
-r coef0 : set coef0 in kernel function (default 0)
-c cost : set the parameter C of C-SVC, epsilon-SVR, and nu-SVR (default 1)
-n nu : set the parameter nu of nu-SVC, one-class SVM, and nu-SVR (default 0.5)
-p epsilon : set the epsilon in loss function of epsilon-SVR (default 0.1)
-m cachesize : set cache memory size in MB (default 100)
-e epsilon : set tolerance of termination criterion (default 0.001)
-h shrinking: whether to use the shrinking heuristics, 0 or 1 (default 1)
-b probability_estimates: whether to train a SVC or SVR model for probability estimates, 0 or 1 (default 0)
-wi weight: set the parameter C of class i to weight*C, for C-SVC (default 1)
-v n: n-fold cross validation mode
??? Attempt to reference field of non-structure array.
any body can suggest what is wrong?
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