How to use Kernel Ridge Regression Function in Matlab - fitrkernel

Question

Telema Harry 2023-10-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2029314-how-to-use-kernel-ridge-regression-function-in-matlab-fitrkernel

回答： Anjaneyulu Bairi 2023-10-11

I am trying to perform regression using kernel ridge regression in Matlab. Is there a dedicated function for Kernel Ridge Regression in Matlab?

I used the fitrkernel function, but the result is not correct. Am I doing something wrong?

Secondly, how can I specify the kernel to use.

N = 100;

data_x = linspace(0,20,N);

data_x = data_x';

data_y = sin(data_x);

[Mdl, FitInfo] = kernel_ridge_regression1(data_x, data_y);

x_test = linspace(0,15,75);

x_test = x_test';

actual_y = sin(x_test) ;

y_predict = predict(Mdl,x_test); % I used same data to test the results

figure(2)

plot(x_test,actual_y, 'o','lineWidth',2);

hold on

plot(x_test,y_predict, 'r','lineWidth',2);

legend("Original y", "Predicted y", 'interpreter','latex')

xlabel ('$x$','fontsize',18,'interpreter','latex')

ylabel('$y$','fontsize',18,'interpreter','latex')

%% FUNCTION

function [Mdl, FitInfo] = kernel_ridge_regression1(data_x_train, data_y_train)

data_x_train_b = zscore(data_x_train); % Standardize the data

[Mdl,FitInfo] = fitrkernel(data_x_train_b ,data_y_train);

end

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Answer 1

Anjaneyulu Bairi 2023-10-11

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2029314-how-to-use-kernel-ridge-regression-function-in-matlab-fitrkernel#answer_1330604

I Understand that you are trying to perform regression using kernel ridge regression. Try to explore the below link and download the files which has example and explanation of Kernel Ridge Regression and please note that it is a third-party support package and not provided by MathWorks.