how can i add a new kernel to libSVM?

Hi I want to add a kernel to libsvm or change rbf formula in libsvm, how can I do this??(in matlab code of LibSVM)

[Walter Roberson]

libsvm is a third-party product, https://www.csie.ntu.edu.tw/~cjlin/libsvm/ . Any ability to add a kernel or change the rbf formula would be in the documentation for it.