real

Real part of a complex number.

Category: Mathematics > Elementary Math

Syntax

Y = real(Z)

Description

For z = a + b*i, real(z) is a. The function is also a convenient way to discard the tiny imaginary parts that rounding can leave in a result that should be real, for instance the eigenvalues of a symmetric matrix computed by a roundabout route. Do this only when the leftover imaginary part is really negligible.

The class of integer input is preserved.

Input arguments

Z

Numeric array, real or complex.

Output arguments

Y

Real array of the same size as Z. A real input is returned unchanged.

Example

Real part of complex values

real([1+2i 3 -4i])
real(3+4i)
real(int8(4))

ans = 1×3

     1     3     0
ans = 3
ans = int8
   4

See also

imag complex conj abs angle