complex (MATLAB Function Reference)

Construct complex data from real and imaginary components

Syntax

c = complex(a,b)
c = complex(a)

Description

c = complex(a,b)

creates a complex output, c, from the two real inputs.

c = a + bi

The output is the same size as the inputs, which must be equally sized vectors, matrices, or multi-dimensional arrays.

The complex function provides a useful substitute for expressions such as

a + i*b   or   a + j*b

in cases when the names "i" and "j" may be used for other variables (and do not equal

), or when a and b are not double precision.

c = complex(a)

uses input a as the real component of the complex output. The imaginary component is zero.

c = a + 0i

Example

Create complex uint8 vector from two real uint8 vectors.

a = uint8([1;2;3;4])
b = uint8([2;2;7;7])
c = complex(a,b)
c =
   1.0000 + 2.0000i
   2.0000 + 2.0000i
   3.0000 + 7.0000i
   4.0000 + 7.0000i