how to repeat a code until a certain input has been recieved

i have little to no experience in MATLAB and basically i want my code to repeat a pattern infinitly until it recieves a certain input. I am using MATLAB arduino and just wondering if anyone has any ideas

Answer 1

[Sam Chak]

Hi @zach

Here is a simple example estimate the value of π using the while loop to infinitely repeat the execution of instructions when condition is true.

%% Simple script to estimate the value of pi using Monte Carlo method
nic = 0;    % initiate the number of points lies inside  the circle
noc = 0;    % initiate the number of points lies outside the circle

hold on
while true  % repeat infinitely until condition is met
    % generate random coordinates between -1 and 1
    x   = sign(2*rand - 1)*rand;
    y   = sign(2*rand - 1)*rand;
    
    plot(x, y, '.', 'color', '#265EF5');
    
    % compute the distance of (x, y) with relative to (0, 0)
    d   = sqrt(x^2 + y^2);
    if d <= 1   % it lies inside  the circle
        nic = nic + 1;  % count nic + 1
    else
        noc = noc + 1;  % count noc + 1
    end
    
    % compute the estimation of the pi number
    piEst = 4*(nic/(nic + noc));
    
    % terminate the iteration if the condition is met
    if abs(piEst - 3.1416) <= 1e-5
        break
    end
end

disp('Total number of points lies inside the circle'), disp(nic)

Total number of points lies inside the circle
        1259

disp('Total number of points lies outside the circle'), disp(noc)

Total number of points lies outside the circle
   344

Total_iteration = nic + noc;

center  = [0, 0];
radius  = 1;
viscircles(center, radius);
hold off

xlabel('x'), ylabel('y')
title(sprintf('Total number of points is %d', Total_iteration))

axis equal

●

disp(piEst)

    3.1416

[zach]

thanks so much sam