create a script that makes a x y graph. every time that i run the script i want to add new defined x y points in matlab

main.m
% Define x and y values
x = [1, 2, 3, 4];
y = [5, 3, 8, 4];

% Plot graph
plot(x, y)

% Add labels and title
xlabel('X values')
ylabel('Y values')
title('My Graph')
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12 lines

main.m
% Define empty x and y vectors
x = [];
y = [];

% Get new x and y values from user
new_x = input('Enter x value: ');
new_y = input('Enter y value: ');

% Add new values to vectors
x(end+1) = new_x;
y(end+1) = new_y;

% Plot graph with all points
plot(x,y)

% Add labels and title
xlabel('X values')
ylabel('Y values')
title('My Graph')
336 chars
20 lines