Design filter by Rectangular window function

Matlab program to design filter by Rectangular window function.

Matlab code

clc; close all; clear all; 

Wc=.5*pi;

taps=25; % No of taps 

N=taps-1; % Filter order 

f=N/2;

eps=.001; n=0:N;

hd=sin(Wc*(n-f+eps))./(pi*(n-f+eps)); 

Wr=boxcar(taps);% Rectangular window 

hr=hd.*Wr'; % Filter coefficient 

[h,w]=freqz(hr,1,1024);

plot(w/pi,abs(h)); 

title('Magnitude Response'); 

ylabel('Magnitude');

xlabel('Normalised Frequency ( x pi rad/sample)-->'); 

legend('By Rectangular window')

Figure window