how to plot vectors of unequal length in matlab?

Hi,

I have the following and I need to plot in time domain

fs = 40; t1 = 0:( 1/fs ):6; S2 = [ sin( 2*pi*5*t1( t1<=2 ) ), sin( 2*pi*10*t1( 2<t1<4 ) ),sin( 2*pi*15*t1( t1>4 ) ) ];

plot(t1,S2)

I am getting an error because t1 and S2 have different lengths?

How can I make then equal in length to plot S2 in time domain?

Thanks, I really appreciate your help

Answer 1

[Cyrus]

You can make them equal in the following way, but you might want to assign any other value instead of "0" which best match your purpose.

fs = 40; 
t1 = 0:( 1/fs ):6; S2 = [ sin( 2*pi*5*t1( t1<=2 ) ), sin( 2*pi*10*t1( 2<t1<4 ) ),sin( 2*pi*15*t1( t1>4 ) ) ];

for i = length(t1)+ 1 : length(S2)
    t1(:, i) = 0;
end

plot(t1,S2)