Error using stem()...... X must be same length as Y.

clc;
clear all;
close all;
i=-5:0.1:5;
l=length(i);
%unit step signal
for t=1:1
    if i(t)<0
        u(t)=0;
    else
        u(t)=1;
    end;
end;
figure(1)
subplot(2,1,1);
plot(i,u);
xlabel('time');
ylabel('amplitude');
title('continous time unit step');
subplot(2,1,2);

stem(i,u);

Error using stem
X must be same length as Y.

xlabel('time');
ylabel('amplitude');
title('discrete time unit step');

[Florian Bidaud]

Hi, please provide a well formatted code, this is absolutely unreadable

[Deva]

clc;
clear all;
close all;
i=-5:0.1:5;
l=length(i);
%unit step signal
for t=1:1
    if i(t)<0
        u(t)=0;
    else
        u(t)=1;
    end;
end;
figure(1)
subplot(2,1,1);
plot(i,u);
xlabel('time');
ylabel('amplitude');
title('continous time unit step');
subplot(2,1,2);
stem(i,u);
xlabel('time');
ylabel('amplitude');
title('discrete time unit step');

[Deva]

Error in

stem(i,u);

[KSSV]

This is the whole code given by the OP:

clc; clear ;
clc; clear all; close all; 
i=-5:0.1:5; 
l=length(i); 
%unit step signal 
for t=1:1 
    if i(t)<0 
        u(t)=0; 
    else 
        u(t)=1; 
    end; 
end; 
figure(1) 
subplot(2,1,1); 
plot(i,u); 
xlabel('time'); 
ylabel('amplitude'); 
title('continous time unit step'); 
subplot(2,1,2); 
stem(i,u(t)); 
xlabel('time'); 
ylabel('amplitude'); 
title('discrete time unit step'); 
% ramp signal 
for t=1:1 
    if i(t)<0 
        r(t)=0; 
    else 
        r(t)=i(t); 
    end; 
end; 
figure(2) 
subplot(2,1,1); 
plot(i,r); 
xlabel('time'); 
ylabel('amplitude'); 
title('continous time ramp signal'); 
subplot(2,1,2); 
stem(i,r); 
xlabel('time'); 
ylabel('amplitude'); 
title('disc time unit ramp signal'); 
%sinusoidal signal 
f=0.1; 
sinus=sin(2*pi*f*i); 
figure(3) 
subplot(2,1,1); 
plot(i,sinus); 
xlabel('time'); 
ylabel('amplitude'); 
title('continous time sinusoidal signal'); 
subplot(2,1,2); 
stem(i,sinus); 
xlabel('time'); 
ylabel('amplitude'); 
title('discrete time sinusoidal signal'); 
%impulse signal 
for t=1:1 
    if i(t)==0 
        imp(t)=1; 
    else 
        imp(t)=0; 
    end; 
end; 
figure(4) 
subplot(2,1,1); 
plot(i,imp); 
xlabel('time'); 
ylabel('amplitude'); 
title('continous time impulse signal'); 
subplot(2,1,2); 
stem(i,imp) ; 
xlabel('time'); 
ylabel('amplitude'); 
title('discrete time impulse signal'); 
% exponential signal 
n=-1:0.1:1; 
a=1; 
exp11=exp(a*n); 
figure(5) 
subplot(2,1,1); 
plot(n,exp11); 
xlabel('time'); 
ylabel('amplitude'); 
title('continous time exponential signal'); 
subplot(2,1,2); 
stem(n,exp11); 
xlabel('time'); 
ylabel('amplitude'); 
title('discrete time exponential signal'); 
%traingular signal 
t=0:0.01:1; 
d=0:0.2:1; 
y1=pulstran(t,d,'tripuls',0.1);
d=0.1:0.2:1; 
y2=pulstran(t,d,'tripuls',0.1); 
tri=y2-y1; 
figure(6) 
subplot(2,1,1); 
plot(i,tri); 
xlabel('time'); 
ylabel('amplitude'); 
title('continous time triangular signal'); 
subplot(2,1,2); 
stem(i,tri); 
xlabel('time'); 
ylabel('amplitude'); 
title('discrete time triangular signal'); 
% square signal 
i=0:0.1:3; 
l=length(i); 
f=1; 
sq=square(2*pi*f*i); 
figure(7) 
subplot(2,1,1); 
plot(i,sq); 
xlabel('t--->'); 
ylabel('amp --->'); 
title('continous time square signal'); 
subplot(2,1,2); 
stem(i,sq); xlabel('samples --->'); 
ylabel('amplitude --->'); 
title('discrete time square signal'); 
% sinc function 
i=-5:0.1:5; 
l=length(i); 
ss=sinc(i); 
figure(8) 
subplot(2,1,1); 
plot(i,ss); 
xlabel('t--->'); 
ylabel('amp --->'); 
title('continous time sinc signal'); 
subplot(2,1,2); 
stem(i,ss); 
xlabel('samples --->'); 
ylabel('amplitude --->'); 
title('discrete time sincsignal'); 
% sawtooth waveform 
 T=10*(1/50); 
 fs=1000; 
 dt=1/fs; 
 t=0:dt:T-dt; 
 y=2*sawtooth(2*pi*50*t); 
 figure(1);
 subplot(2,1,1); 
 plot(t,y); 
 grid on; 
 subplot(2,1,2); 
 stem(t,y); 
 grid on;

[Deva]

Did you get all signals in this program,i didn't getting impulse, triangular and sawtooth signals at a time.

Answer 1

[Florian Bidaud]

You need to replace for t=1:1 by for t = 1:l

[Deva]

clc;
clear all;
close all;
i=-5:0.1:5;
l=length(i);
%unit step signal
for t=1:l
    if i(t)<0
        u(t)=0;
    else
        u(t)=1;
    end;
end;
figure(1)
subplot(2,1,1);
plot(i,u);
xlabel('time');
ylabel('amplitude');
title('continous time unit step');
subplot(2,1,2);
stem(i,u);
xlabel('time');
ylabel('amplitude');
title('discrete time unit step');

I got the answer 😁tq

Answer 2

[KSSV]

I have given one wproper working code for unit step signal. Understand it and change the others like wise.

t=-5:0.1:5; 
nt = length(t) ; 
%unit step signal 
u = zeros(1,nt) ; 
for i=1:nt
    if t(i) < 0 
        u(i)=0; 
    else 
        u(i)=1; 
    end
end
figure(1) 
subplot(2,1,1); 
plot(t,u); 
xlabel('time'); 
ylabel('amplitude'); 
title('continous time unit step'); 
subplot(2,1,2); 
stem(t,u); 
xlabel('time'); 
ylabel('amplitude'); 
title('discrete time unit step'); 

You need not to use aloop. Without loop:

t=-5:0.1:5; 
nt = length(t) ; 
%unit step signal 
u = ones(1,nt) ; 
u(t<0) = 0 ;

figure(1) 
subplot(2,1,1); 
plot(t,u); 
xlabel('time'); 
ylabel('amplitude'); 
title('continous time unit step'); 
subplot(2,1,2); 
stem(t,u); 
xlabel('time'); 
ylabel('amplitude'); 
title('discrete time unit step');