Is changing the 'KernelScale' in the fitcsvm equivalent to changing the sigma value?

11 visualizaciones (últimos 30 días)
Hello,
I am using this command:
cl3 = fitcsvm(X,Y,'KernelFunction','rbf', 'Standardize',true,'BoxConstraint',10,'ClassNames',[-1,1]);
to run the Gaussian Radial Bias kernel. I understand that the default value for sigma = 1. I was told that in order to change the sigma value, use this command:
cl3 = fitcsvm(X, Y, 'KernelFunction', 'rbf', 'KernelScale', 0.2, 'Standardize', true, 'BoxConstraint', 100, 'ClassNames', [-1,1]);
In this case, the sigma value can now be changed by modifying the 'KernelScale'. Is this a correct statement?
  3 comentarios
Aniket Borkar
Aniket Borkar el 16 de Dic. de 2016
But where can we set the C and sigma value? Box constraint =100 and kernel scale =0.2. How does these settings can vary C and sigma?
Akshar Agarwal
Akshar Agarwal el 23 de Jun. de 2017
the C value is the box constraint. It is called box constraint because it sets bounds on the lagrange multipliers in the actual function.

Iniciar sesión para comentar.

Respuestas (0)

Categorías

Más información sobre Statistics and Machine Learning Toolbox en Help Center y File Exchange.

Etiquetas

Productos

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by