How can we find y variable to apply SVM by using selected genes data?.

Question

[Minushi]

I have this type of data

                      GSM 110   GSM 111  ........   .......       GSM132
        Gene1          6.5         7.3    ....       .....          8.5
        Gene2          5.3         7.9     ..         ..            8.9
            ..         ..          ..      ..         ..            ...
            ..         ..          ..      ..         ..            ...
            ..         ..          ..      ..         ..            ...
        Gene100        ..          ..      ..         ..            ...

I want to apply SVM classification for genes types(Gene1,Gene2.,,,).Then how can we find y ( class1,class 2) variable to apply SVM.Could you please help me?.