how to find real&imagenery part of complecs symbolic expression ?

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lets say i want to get real &imegenry part of symbolic complex expression . so I wrote this simple code :
clc;clear all;
syms a b
H=a*i+b
real_H=real(H)
how ever the answer is not correct ,is there and other way ?

Accepted Answer

KALYAN ACHARJYA
KALYAN ACHARJYA on 5 Jun 2019
Edited: KALYAN ACHARJYA on 5 Jun 2019
syms a b real
%.........^
H=a*i+b;
real_H=real(H)
imag_H=imag(H)
Output:
real_H =
b
imag_H =
a

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