MATLAB: My while loop is giving an error “Array indices must be positive integers or logical values.” I’m trying to calculate the golden ratio within epsilon 0.001.

vectorizationwhile loop

I am stuck in the initiation of my while loop. I attached the file and an image of the code. I've done everything I can think of but I'm still learning and can't see what I'm doing wrong here.

Best Answer

Probably something more like this:
%Program Description:
%This program takes 2 numerical inputs and calculates/estimates the golden
%ratio within epsilon 0.001.
%
% Record of Revisions:
%     Date         Programmer          Description of change
%     ====         ==========          =====================
%    4/7/18      Alan Clemenson          Original Code
%   
%User Prompts
n1=input('type in value for first #:  ');
n2=input('type in value for second #:  ');
% Compute results
%index for the numbers following n1&n2 in the fibonacci sequence 'x'.
%Previous fib no.
x(1) = n2-n1
% Place Assignment of n1&n2 in the sequence
x(2)= n1
x(3)= n2
%the absolute value of the difference between two ratios>0.001
    while (abs(x(3)/x(2)-x(2)/x(1))>0.001);
        %The Fibonacci sequence.
        nextFib=x(2)+x(3);
        x=circshift(x,-1);
        x(3)=nextFib;
        Ratio=x(3)/x(2);
      end
  fprintf('\n The Golden Ratio = %f \n',Ratio);
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