error using svmtrain (not enough inputs)

i am using a code

    clc

    C=[1 2 3 ;4 5 6]
    TrainLabel=C;TrainVec=[0;1];
    bestcv = 0;
    for log2c = -6:10,
      for log2g = -6:3,
        cmd = ['-v 5 -c ', num2str(2^log2c), ' -g ', num2str(2^log2g)];
        cv = svmtrain(TrainLabel,TrainVec, cmd);
        if (cv >= bestcv),
          bestcv = cv; bestc = 2^log2c; bestg = 2^log2g;
        end
        fprintf('(best c=%g, g=%g, rate=%g)\n',bestc, bestg, bestcv);
      end
    end

i get error as

Error using ==> svmtrain at 225
Incorrect number of arguments to svmtrain.

Error in ==> ex2011 at 10
    cv = svmtrain(TrainLabel,TrainVec, cmd);

please help were i have done mistake

Answer 1

[Ilya]

If you are using svmtrain function from the official MATLAB install (verify by typing 'which svmtrain' in your command window), it does not accept the syntax of your cmd string. Please read 'help svmtrain' or 'doc svmtrain'.

Answer 2

[Walter Roberson]

The Mathworks-provided svmtrain() does not accept an argument which is a single string with flags and values. Instead it accepts only name/value pairs, such as

svmtrain(TrainLabel,TrainVec, 'method', 'SMO')

The flags you use have no obvious correspondence in the supported name/value pairs.

http://www.mathworks.com/help/toolbox/bioinfo/ref/svmtrain.html

[kash]

But walter i want to apply those values of c and gamma,i want to use rbf kernel,is what i had performed correct?

[kash]

i got those codings from one of websites only

[Walter Roberson]

See http://www.mathworks.com/support/solutions/en/data/1-DO8141/index.html?product=BI&solution=1-DO8141

Answer 3

[ansha nisar]

How can I resolve this problem Error using svmtrain

[Walter Roberson]

models{k} = fitcsvm(Trainfea, G1vAll, 'solver', 'SMO');

and later

if predict(models{k}, Testfea(j,:))