Question

Perform Zooming to the particular portion of the image through figure window in Matlab. Specify each program lines of Matlab with appropriate comments.(25 Marks) 4.

Answer 1

t = linspace(0,2*pi,1000); % values in time

x = cos(t); % a sinusoid

perturbation = 0.1*exp((-(t-5*pi/4).^2)/.01).*sin(200*t); % a perturbation

signal = x+perturbation; % a signal to plot

% plot signal on new figure

figure,plot(t,x+perturbation)

xlabel('time'),ylabel('signal')

% create a new pair of axes inside current figure

axes('position',[.65 .175 .25 .25])

box on % put box around new pair of axes

indexOfInterest = (t < 11*pi/8) & (t > 9*pi/8); % range of t near perturbation

plot(t(indexOfInterest),signal(indexOfInterest)) % plot on new axes

axis tight