Introduction to the MATLAB Environment - Digital Signal Processing: Fundamentals and Applications - page 769

0.9273

» real(z) % Real part of a complex number z

ans ¼
3

» imag(z) % Imaginary part of a complex number z

ans ¼
4

» exp(j*pi/4) % Polar form of a complex number

ans

¼
0.7071 + 0.7071i

The following shows examples of array operations. Krauss, Shure, and Little (1994) and Stearns
(2003) give detailed explanation for each operation.

» x ¼ [1 2; 3 4] % Initialize 2 2 matrixes

x 12
34

» y ¼ [-4 3; -2 1]
y -4 3
-2 1

» x+y % Add two matrixes

ans ¼
-3 5
15

» x*y % Matrix product

ans ¼
-8 5
-20 13

» x.*y % Array element product

ans

¼
-4 6
-6 4

» x' % Matrix transpose

ans ¼
13
24

» 2.^x % Exponentiation: matrix x contains each exponent

ans ¼
24
816