Complex Numbers
Complex number creation
The creation of complex numbers in matlab is straight forward. The letter i is used as expected and no multiplication operator is required between i and the coefficient.
z = 4 - 3i
Complex number basic operations
The operations are the same as with other number types:
- Addition “+”
- Substraction “-“
- Multiplication “*”
- Division “/”
- Power “^”
In order to obtain the complex conjugate there are two different ways: using the conj() function or using the “ ‘ “ operator.
conjz = conj(z)
conjz2 = z'
To obtain the magnitude of a complex number use the norm() function.
norm(z)
To obtain the argument of a complex number use the angle() function.
angle(z)
The real and imaginary parts of a complex number can be obtained separately using the real() and imag() functions.
real(z)
imag(z)
Plotting
- plot(X, Y) generates a 2D plot of X values against Y values. X and Y have to be equal-sized Row/Column matrices. Full Documentation
plot(z,"r*")
