MATLAB Programming

2 Data Types
Complex Numbers
Complex numbers consist of two separate parts: a real part and an imaginary
part. The basic imaginary unit is equal to the square root of -1. Thisis
represented in MATLAB by either of two letters: i or j.
Creating Complex Numbers
The following statement shows one way of creating a complex value in
MATLAB. The variable x is assigned a complex number with a real part of 2
and an imaginary partof3:
x = 2 + 3i;
Another way to create a complex number is using the complex function. This
function combines two numeric inputs into a complex output, making the first
input real and the second imaginary:
x = rand(3) * 5;
y = rand(3) * -8;
z = complex(x, y)
z =
4.7842 -1.0921i 0.8648 -1.5931i 1.2616 -2.2753i
2.6130 -0.0941i 4.8987 -2.3898i 4.3787 -3.7538i
4.4007 -7.1512i 1.3572 -5.2915i 3.6865 -0.5182i
You can separate a complex number into its real and imaginary parts using
the real and imag functions:
zr = real(z)
zr =
4.7842 0.8648 1.2616
2.6130 4.8987 4.3787
4.4007 1.3572 3.6865
zi = imag(z)
zi =
-1.0921 -1.5931 -2.2753
-0.0941 -2.3898 -3.7538
-7.1512 -5.2915 -0.5182
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