How to separate Real & Imaginary Parts

[zahriladha]

separate real and imaginary part matlab

Dear experts,

I have problems to separate the real parts and imaginary parts.

let says we have the following equations:

y1 = (a^2-5*a+1-w^2+3*i*w)/(3*a^2+7*a-3*w^2+i*w)

where i=j (imaginary part)

To separate the real parts and imginary parts using matlab, a multiplication with:
(3*a^2+7*a-3*w^2-i*w) is performed to numerator & denumerator.

The M file is shown as below:
w='w'
y1=(a^2-5*a+1-w^2+3*i*w)/(3*a^2+7*a-3*w^2+i*w)
conj=(3*a^2+7*a-3*w^2-i*w)
y1_new=((a^2-5*a+1-w^2+3*i*w)*conj)/((3*a^2+7*a-3*w^2+i*w)*conj)

when I peformed with Matlab, the results were not as expected in which I need to remain the variable a & w. Actually, I'm not sure how to perform separate real & imaginary parts using Matlab.

Could someone help me to advise 1) the appropriate method to separate the real & imaginary parts. 2) How to perform the dy1_new/dw from y1_new.

Finally I should get the value of 'a' and 'w' after answered the questions in 1) and 2).

Thank you very much

 

[Sal]

Hik

your process is good for separating the real and imaginary components, no comments about other requests

Sal

 

[immadsiddiqui]

Just multiply and divide the denominator with the equation and you will get a real value in the denominator. so just divide it with the upper portion of equation and you will get both parts separated.

 

[zahriladha]

do you know how to compute them in matlab. thks to let me know if you have examples either you have links or softcopy files. I really appreciate.

thks