PRACTICAL MATLAB® FOR ENGINEERS PRACTICAL MATLAB

50 Practical MATLAB® Applications for Engineers

wham = hamming(31);

whan = hanning(31);

wblac = blackman(31);

plot(n,wham,’*’,n,whan,’d’,n,wblac,’o’);

hold

plot(n,wham,n,whan,n,wblac);

title(‘HAMMING,HANNING and BLACKMAN windows ‘);

xlabel(‘points n’);

ylabel(‘Amplitude’)

legend(‘HAMM’,’HANN’,’BLAC’);

R.1.158 The Kaiser window is a controllable window (controlled by β), and is presented as
follows, by the script fi le Kaisers for the following values of β: 3 , 7 , and 10 , using an
N = 31-point approximation.

MATLAB Solution

% Script file: Kaisers

% This file returns the plots

% KAISER window for betas: 3,7,10.

% using a 31 point approximation

%*******************************

clc;clf;

n = -15:1:15;

wk3 = kaiser(31,3);wk7=kaiser(31,7);

HAMMING, HANNING, and BLACKMAN windows

1

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

− 15 − 10 − 5 0 5 10 15

points n

Hamm

Hann

Blac

Amplitude

n

n

FIGURE 1.40
Plots of Hamm, Hann, and Blackman windows of R.1.157.