% M-file names must start with an alphabetic character,
%   may contain any alphanumeric characters or underscores

clear;  % Clear variables and functions from memory.
clc;    % Clear command window.


% 1.9 (d)
n = 1:31;
x = sin(10*n);
n = 0:30;
stem(n, x, 'filled');
xlabel('n');
ylabel('x[n]');
title('1.9 (d)');
