The radial basis function is defined on the whole R^2 plane, while we only take a subset, so in my opinion the kernel sums up to less than 1. I am wondering why the kernel in this slide sums up to exactly 1 and how do we get it.
The radial basis function is defined on the whole R^2 plane, while we only take a subset, so in my opinion the kernel sums up to less than 1. I am wondering why the kernel in this slide sums up to exactly 1 and how do we get it.