Support vector machine is not working?? help??

i have two data which is pxx3 and pxx4. below is my code program..

          plot(pxx3,'go')
          hold on
          plot(pxx4,'ro')
          hold off
          cdata = [pxx3;pxx4];
          grp = ones(2050,1);
          % green label 1, red label -1
          grp(1025:2050) = -1;
          svmStruct = svmtrain(cdata,grp,'Kernel_Function','rbf',...
          'showplot',true);
          hold on

but it keep showing "Warning: The display option can only plot 2D training data. > In svmtrain at 398 " what is my fault?? help please??

[Jan]

I've deleted the duplicate question. Adding "matlab" as a tag is meaningless, because all questions in this forum concern Matlab.

We cannot guess the dimensions of pxx2 and pxx4, such that the size of cdata is not clear. But the error message seems to tell you, that this is not a 2D matrix. Please show us more details.