Newton's Method error message
1 view (last 30 days)
Show older comments
I keep recieving this error code and I don't know how to fix it or if it will even work after i fix it. The initial value is supposed to be 20 and the threshold is 0.1.
Index exceeds the number of array elements (0).
Error in EE291_Pr01_crise_kylee_part2 (line 17)
w(n+1)= w(n)-(z(w(n))/dz(x(n)));
clc;
clear;
z=@(w) (100+(0.5*w/(.0000003*w^2+1)));
c=0.0000003;
a=50000000;
b=10000000;
dz=@(w) (a*(3*w^2-b))/((3*w^2+b)^2);
w0=20;
w(1)=w0;
thr=0.1;
err=1;
n=0;
w=zeros(0, 10000000);
while err>=1e-1
%set while-conditions
n=n+1;
w(n+1)= w(n)-(z(w(n))/dz(x(n)));
%compute next iterate
err=abs((w(n+1)-w(n))/w(n+1))*100;
%compute error
end
disp(n);
disp(w);
disp(err);
0 Comments
Answers (1)
Jim Riggs
on 1 Nov 2019
The variable x is not defined in
w(n+1) = w(n) - (z(w(n))/dz(x(n)));
0 Comments
See Also
Categories
Find more on Debugging and Analysis in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!