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What is the right formula for the RBF 'KernelScale' of fitcsvm?
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RBF kernel function is defined as exp(-1/(2*sigma^2) ....
The option 'KernelScale' of the Matlab function fitcsvm, does it refer to sigma, sigma^2, 2*sigma^2, or sqrt(2)*sigma ?
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Ayush Anand
2024-1-12
编辑:Ayush Anand
2024-1-12
Hi,
The RBF kernel function is defined as :
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1588986/image.png)
The "KernelScale" option in the function "fitcsvm" refers to σ (sigma) in the above equation.
You can read more through the definition of parameters of the "fitcsvm" function here:
Hope this helps!
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