Introduction to MATLAB - Continuous and Discrete Time Signals and Systems - page 845

>> % Part (a)
>> figure(5)

% Select figure 5 for plots

>> clf % Clear figure 5

>> k = [-5:5]; % k = [-5 -4 ...0 ...4 5]

>> f1 = sin(0.1*pi*k); % Calculate function f1

>> subplot(2,2,1); % Divides fig 5 into (m = 2)

% vertical and (n = 2)
% horizontal sub-figures.
% The last argument (p = 1)
% accesses sub-figures
% (1 <= p <= m*n).

>> stem(k,f1,'filled');
grid on; % DT plot of f1 versus k

>> xlabel('k') ; % Label of X-axis

>> ylabel('f1[k]') % Label of Y-axis

>> % Part (b)
>> k = [-7:7];

% k overwritten to
% [-7 -6 ...0 ...6 7]

>> f2 = 2. ∧

(-k) ; % Calculate function f2

>> subplot(2,2,2); % Selectp=2sub-figure

>> stem(k,f2,'filled');
grid on; % DT plot of f2 versus k

>> xlabel('k'); % Label of X-axis

>> ylabel('f2[k]'); % Label of Y-axis

>> % Part (c)
>> k = [0:9]; % k overwritten to
[0 1 ...8 9]
>>f3=[1111133333];%Calculate function f3
>> subplot(2,2,3); % Selectp=3sub-figure

>> stem(k,f3,'filled');
grid on; % DT plot of f3 versus k

>> xlabel('k'); % Label of X-axis

>> ylabel('f3[k]'); % Label of Y-axis

>> % Part (d)
>> k = [0:9];
>>f4=[0123450000];%Calculate function f4
>> subplot(2,2,4);

% Selectp=4sub-figure

>> stem(k,f4, 'filled');
grid;

% DT plot of f2 versus k

>> xlabel('k'); % Label of X-axis

>> ylabel('f4[k]'); % Label of Y-axis

>> print -dtiff plot.tiff; % Save the figure as a

% TIFF file