Window Functions in MATLAB

Just create a new file with extension .m and paste the code below in that .m file. Then Run it.

clear all;

clc;

%starting of hamming

wc=.5*pi;

N=input('Enter the number of points : ');

subplot(6,1,1)

plot(hamming(N));grid;

ylabel('<-Magnitude->');

xlabel('<--Time-->');

b=fir1(N,wc/pi,hamming(N+1));

w=0:.01:pi;

h=freqz(b,1,w);

subplot(6,1,2)

plot(w/pi,abs(h));grid;

ylabel('<-Magnitude->');

xlabel('<--Normalized Frequency-->');

%starting of hanning

wc=.5*pi;

subplot(6,1,3)

plot(hanning(N));grid;

ylabel('<-Magnitude->');

xlabel('<--Time-->');

b=fir1(N,wc/pi,hanning(N+1));

w=0:.01:pi;

h=freqz(b,1,w);

subplot(6,1,4)

plot(w/pi,abs(h));grid;

ylabel('<-Magnitude->');

xlabel('<--Normalized Frequency-->');

%starting of rectangular

wc=.5*pi;

subplot(6,1,5)

plot(boxcar(N));grid;

ylabel('<-Magnitude->');

xlabel('<--Time-->');

b=fir1(N,wc/pi,boxcar(N+1));

w=0:.01:pi;

h=freqz(b,1,w);

subplot(6,1,6)

plot(w/pi,abs(h));grid;

ylabel('<-Magnitude->');

xlabel('<--Normalized Frequency-->');