Clear Filters
Clear Filters

Need Help with Newton's Method for the Following code; keep getting errors

1 view (last 30 days)
clc;
close all;
clear all;
x = 1;
y = 2;
for i = 1:10
f(x) = (-x(i).^2) - (2*y(i)) + 2;
f(y) = (-x(i)) - (4*y(i).^2) + 4;
A(1,1) = 2*x(i);
A(1,2) = 2;
A(2,1) = 1;
A(2,2) = 8*y(i);
Z_new = f'\A + f; %f' denotes a column
x(i) = Z_new(1,1);
y(i) = Z_new(1,2);
end
end
  1 Comment
KSSV
KSSV on 12 Feb 2016
what is that code? It will not work. x and y are scalars, you are expecting it to be vector inside the loop. You have to read basics of matlab and the problem you are solving.

Sign in to comment.

Answers (1)

Marc
Marc on 12 Feb 2016
You may want to look into the following in the documentation:
  • @ or annonymous functions
  • preallocation
Cleve Moler's recent blog on Newton's method gives a good example of setting up an anonymous function, its derivative and has a simple implementation of newton's method already there.

Categories

Find more on Linear Algebra 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!