To plot standard DT signals > Matlab

To plot standard DT signals > Matlab

Digital Signal Processing 

1)UNIT IMPULSE

n1=input('Lower limit')

n2=input('Upper limit')

x=n1:n2;

y=[x==1];

stem(x,y);

2)UNIT STEP

(A)DISCRETE

n1=input('Enter the lower limit');

n2=input('Enter the upper limit');

n=n1:n2;

x=[n>=0];

stem(n,x);

title('Unit Step Signal - Discrete');

(B)CONTINUOUS

n2=input('Enter the upper limit');

n=0:n2;

x=[n>=0];

plot(n,x);   

title('Unit Step Signal - Continuous');

3)UNIT RAMP SIGNAL:

n1=input('Enter lower limit');

n2=input('Enter upper limit');

n=n1:n2;

x=n.*[n>=0];

subplot(2,1,1);

plot(n,x,'r');

title('Continuous');

subplot(2,1,2);

stem(n,x,'b');

title('Discrete');

4)EXPONENTIAL  SIGNAL

n1=input('Enter lower limit');

n2=input('Enter upper limit');

t=n1 : n2;

a=input('Enter the value for a');

y=exp(a*t);  

subplot(2,1,1);

plot(t,y,'r');

title('Continuous');

subplot(2,1,2);

stem(t,y,'b');

title('Discrete');

5)SINUSOIDAL  SIGNAL

x = 0:pi/20:2*pi;

subplot(3,1,1); plot(sin(x))