Info
此问题已关闭。 请重新打开它进行编辑或回答。
hi. I want to draw the 3D PLOT of this but i can only draw 2-D. kindly help. I am new.
1 次查看(过去 30 天)
显示 更早的评论
x = (0:(1/60):1); % intial data as given by problem
m = length(x);
t = zeros(1,m);
t = (0:(1/60):0.5);
t(1, 32:61) = 0;
y = 40*sin(pi*x); % function vector
theta = [1; 0.2;0.8]; %initial theta
aplha = 0.1;
lambda = 2;
X = ones(m,3);
X(:,2) = x;
X(:,3) = t;
h_theta = X*theta;
h_theta = h_theta';
% error
J = 0;
for i = 1:m
J = J + (h_theta(i)-y(i))^2;
end
J = J/(2*m) ; % error using initial theta
Reg = lambda/(2*m) * sum(theta(2:3,1));
J = J + Reg
v = pinv(X'*X)*X'*y' % calculated perms
x1 = (0:0.25:1);
t1 = (0:0.1:0.4);
for i = 1:length(x1)
pol(i) = v(1) + v(2)*x1(i) + v(3)*t1(i);
end
pol
plot3(x1,t1,pol, 'r-')
10 个评论
Walter Roberson
2020-8-30
No, no one can answer the query, not unless they happen to be taking (or giving) the same clasd this is homework for, and so can supply the missing information.
We cannot plot y because there is no equation for y in what you posted. Instead there are equations for the seemingly irrelevant f and g.
回答(0 个)
此问题已关闭。
另请参阅
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!