% 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 (f)
n = 1:11;
x = cos(pi*n .^ 2);
n = 0:10;
stem(n, x, 'filled');
xlabel('n');
ylabel('x[n]');
title('1.9 (f)');
