Kernel Trick
- The Kernel Trick is to project data to a higher dimension.
- Typically, you use the trick when there is not a good linear
separator in you current dimension scheme.
![](kernelEx.gif)
- In this case, the kernel function translates the x and y coordinates
to z coordinates.
- It's going to be something like 7-(distance from 0,0).
- The general problem is that you don't know which kernel to use.
- I just looked for a picture that involved a circle, because
it's pretty easy to explain.
- The problem is made even more difficult by outliers.
- You could use the training data to make a kernel