Introduction to the MATLAB Environment - Digital Signal Processing: Fundamentals and Applications - page 768

» sum(x) % Call MATLAB function sum

ans ¼
3.5000 8.5000 11.5000 % Display the results

»

MATLAB can be used like a calculator to work with numbers, variables, and expressions in the
command window. The following are basic syntax examples:

» sin(pi/4)

ans

¼
0.7071

» pi*4

ans

¼
12.5664

In MATLAB, variable names can store values, vectors and matrices. See the following
examples.

» x ¼ cos(pi/8)
x 0.9239

» y ¼ sqrt(x)-2^2
y -3.0388

» z ¼ [1 -2 1 2]
z 1-212

» zz ¼ [1 2 3; 4 5 6]
zz 123
456

Complex numbers are natural in MATLAB. See the following examples.

» z 3+4i % Complex number

¼

z

3.0000 + 4.0000i

» conj(z) % Complex conjugate of z

ans ¼
3.0000 - 4.0000i

» abs(z) % Magnitude of z

ans ¼
5

» angle(z) % Angle of z (radians)

ans ¼