You need to create a vector, below you can see a method using the "linspace" function. This creates a vector between 0 and t with 100 elements.
a = 3;%的输入('请耐心ase enter a : ')
b = 2;%的输入('请耐心ase enter b : ')
c = 7;%的输入('请耐心ase enter c : ')
t = 5;%的输入('请耐心ase enter t : ')
% create a vector T between [0 T] with 100 elements
t = linspace(0,t,100);
check = a*b/c;
ifcheck > 1
y = (e^a)*sin(c.*t)./sqrt(b);
elseifcheck <= 1 && check >= 0
y = sin(a)*sqrt(b.*t)./sin(c);
else% i.e. check < 1
y = cos(a)*e.^(b.*t)./c;
end
figure
plot(t,y)
xlabel('t axis')
ylabel('y values')
gridon
