Simple pendulum simulation in matlab

Objective: error: without the hold off in line 33 we can\'t get the animation clearly https://www.youtube.com/watch?v=JbXtB-WIv38 clear all close all clc %input Parameters b = 0.2; g = 9.81; l = 1; m = 1; x0 = 0; y0 = 0; % initial condition theta_0 = [1 0]; %time points t_span = linspace(0,20,900); % solve ODE [t, results] = ode45(@(t,theta)…