Query using Support vector machines

Hello, I am attaching a code below for training using SVM for Faces. But i am not getting any plot & also the recognition rate is only 50%. Can you solve the problem? I am attaching the basic code below:-

In training matrix i have taken 2 rows each row has 2 samples of a individual. Now i have fixed the target matrix at:-

target(1:2,:)=1
target(3:4,:)=2

Now i am training the data as follows:-

svmModel = svmtrain(arr1', labelData, ...
               'Autoscale',true, 'Showplot',true, 'Method','QP', ...
               'BoxConstraint',2e-1, 'Kernel_Function','rbf', 'RBF_Sigma',1);
      classes = svmclassify(svmModel,finaltest,'showplot','true')
      cp = classperf(cp, classes, finaltest')

1) I am getting the error:-

Error using classperf (line 373)
Index vector has invalid values.

Error in Svmtrain2 (line 205)
        cp = classperf(cp, classes, finaltest')

2) Please tell me how ti increase the recognition rate?

3) Please tell me how to view the classification plot of SVM ?

Thanks in advance

Ampi.

[Walter Roberson]

Formatted for you. Please review http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup

[Walter Roberson]

Does your newer question replace this one? http://www.mathworks.co.uk/matlabcentral/answers/55685-query-regarding-classification-of-faces-using-svm