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How can I change this code to plot finger below

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Yasir Ghazi
Yasir Ghazi 2017-11-17
回答： Image Analyst 2017-11-18
Code:
clc;
clear all;
close all;
fs = 1000;
t = 0:1/fs:0.2;
Vm = 720; % Volt
f0 = 50 ;% Hz
q = 0.5 ; % Voltage Gain
alpha = 0;
Va = Vm*q*cos(2*pi*f0*t + alpha);
Vb = Vm*(q + 0.2*q*(t == 0.1)).*cos(2*pi*f0*t + alpha);
figure,
plot(t,Va,'r',t,Vb,'b');
xlabel('Time');
ylabel('Va and Vb');
  3 个评论
显示 1更早的评论
Yasir Ghazi
Yasir Ghazi 2017-11-17
No,I not need the legend function but I need to the voltage will continue to rise after t=0.1s
Walter Roberson
Walter Roberson 2017-11-17
Do you mean like
Vb = Vm*(q + 0.2*q*(t >= 0.1)).*cos(2*pi*f0*t + alpha);

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采纳的回答

Image Analyst
Image Analyst 2017-11-18
Finger below? Try this:
clc;
clear all;
close all;
fs = 1000;
t = 0:1/fs:0.2;
Vm = 720; % Volt
f0 = 50 ;% Hz
q = 0.5 ; % Voltage Gain
alpha = 0;
Va = Vm*q*cos(2*pi*f0*t + alpha);
Vb = Vm*(q + 0.2*q*(t == 0.1)).*cos(2*pi*f0*t + alpha);
subplot(2, 1, 1);
plot(t,Va,'r',t,Vb,'b');
title('Voltage Plot Above', 'FontSize', 20);
xlabel('Time', 'FontSize', 20);
ylabel('Va and Vb', 'FontSize', 20);
grid on;
% Now plot finger below.
subplot(2, 1, 2);
imshow('finger.jpg')
title('Finger Below', 'FontSize', 20);

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