I'm using the KernelRidge estimator, which apparently supports various kernels. I've read the documentation:
Apparently one can define own kernel functions. Somehow I have the impression, that there are some predefined kernels. Unfortunately, I can't them? Do you know if there are some? And if yes, could you point me to a location which describes them and their parameters?
Following kernels are supported: RBF, laplacian, polynomial, exponential, chi2 and sigmoid kernels. I drew conclusion from observing the "gamma parameter" description of KernelRidge documentation.
The mathematical formulation of these kernels can be found at this link as mentioned earlier by @ndrizza.
I am also trying to figure out the string arguments for kernel, based on information from SVR page, I think they are something like linear, poly, rbf, and sigmoid. SVR page.
