hey ,i am using this function to implement gradient descent but it returns only the theta value not the J_history value,Please help me in this situtation
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
function [theta,J_history] = gradientDescent(X, y, theta, alpha, num_iters)
% Initialize some useful values
m = length(y); % number of training examples
J_history = zeros(num_iters, 1);
for iter = 1:num_iters
a1=(X*theta-y);
a2=(X*theta-y).*X;
theta(1)=theta(1)-alpha*sum(sum(a1))*(1/m);
theta(2)=theta(2)-alpha*sum(sum(a2))*(1/m);
% Save the cost J in every iteration
J_history(iter) = computeCost(X, y, theta);
end
end
0 commentaires
Réponses (1)
Rohit Kulkarni
le 2 Juil 2022
Modifié(e) : Rohit Kulkarni
le 2 Juil 2022
Hi Ashok,
Are you facing this same issue :
The answer to this may solve your problem.
0 commentaires
Voir également
Catégories
En savoir plus sur WLAN Toolbox dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!