Looking to write a code which utilises a formula to solve an equation

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Sinclair Song
Sinclair Song 2020-4-13
编辑： Sinclair Song 2020-4-15
clc
clear all
close all
AF = @(x) x^3-4x^2-1; % function equation
xR(R/2) = 46/x + 5(x-3); % iterative formula
x3 = 1;
Very new to MATLAB and was wondering how I would go about creating an iteration to output solutions to the problem.
  2 个评论
Mehmed Saad
Mehmed Saad 2020-4-13
编辑：Mehmed Saad 2020-4-13
  1. what is xRk
  2. For how many iterations of R you want to run the formula
  3. what is the purpose of AF function in this code?
Sinclair Song
Sinclair Song 2020-4-13
1. My mistake, it's just meant to be xR, I've corrected it now
2. I'd say 100 to get possible solutions
3. AF is the function equation I'm trying to solve using the values generated from the iterative equation

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回答（1 个）

Mehmed Saad
Mehmed Saad 2020-4-13
k=100;
xR = zeros(1,k);
xR(1) =2; % Initial Guess
for i=2:k
xR(i) = 1+ (1/xR(i-1)); % iterative formula
end
Now xR is an array which contains the value for 100 iteration where each iteration value depends on previous one
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Sinclair Song
Sinclair Song 2020-4-13
编辑：Sinclair Song 2020-4-13
Oh so it turns out the solution is too small to pick up, if I'm interpretting that correctly? How would I go about indexing an array? Thanks for all the guidance!

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