error using svmtrain (not enough inputs)

8 次查看（过去 30 天）
kash
kash 2012-4-5
评论： Walter Roberson 2021-8-12
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

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回答（3 个）

Ilya
Ilya 2012-4-5
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'.
Walter Roberson
Walter Roberson 2012-4-5
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
ansha nisar
ansha nisar 2021-8-12

How can I resolve this problem Error using svmtrain

  1 个评论
Walter Roberson
Walter Roberson 2021-8-12
models{k} = fitcsvm(Trainfea, G1vAll, 'solver', 'SMO');
and later
if predict(models{k}, Testfea(j,:))

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