Code for convolution function in matlab?

Answer 1

%the program is developed my Mohendra Roy

%Bioelectronics division, Department of ECE, Tezpur Central University, India,

a=input('Please Give The RANGE : ');

k=-a:+1:+a;

x=input('The input the x: ')

h=input('The input the h: ')

% x=[1 .5 .25]

% h=[1 .5 .25]

f=fliplr(h);

l1=length(x);

l2=length(h);

l3=l1+l2-1;

l4=l2-1;

y=zeros(1,l3);

for p=1:1:l3

p1=p+l4;

h2=zeros(1,l3);

h2([p:p1])=f;

l5=length(h2);

h1=zeros(1,l5);

h1([l2:l3])=x

c1=h1.*h2

c2=0;

for i=1:1:l3

c2=c2+c1([i]);

end

sum=c2

y([p])=sum

end

% temp1=length(x);

% temp2=length(h);

t=length(y);

t2=(t-1)/2;

v=-t2:1:t2;

subplot(3,1,1),stem(k,x,'*');

subplot(3,1,2),stem(k,h,'g*');

subplot(3,1,3),stem(v,y,'r*');

n=input('The lower limit of X axis is: ')

m=input('The Upper limit of X axis is: ')

o=input('The lower limit of Y axis is: ')

p=input('The Upper limit of Y axis is: ')

subplot(3,1,1),stem(k,x,'*');axis([n m o p]);grid on

subplot(3,1,2),stem(k,h,'g*');axis([n m o p]);grid on

subplot(3,1,3),stem(v,y,'r*');axis([n m o p]);grid on

% subplot(3,1,1);stem(x);

% subplot(3,1,2);stem(h);

% subplot(3,1,3);stem(y);