How to solve complex equations in matlab.?

I have an equation Y=-(1-R)/(1+R); where both Y and R are imaginary. Given the real and imaginary parts of Y (e.g - (0.6,0) ),how to obtain the amplitude and argument of R?

[John D'Errico]

Um, are both Y and R imaginary, or are they complex? Your example has Y as a REAL number, not imaginary at all.

Answer 1

[Carlos]

I think he wants to actually solve the equation, so perhaps he is looking for something like this

>> syms R;
Y=-(1-R)/(1+R)-0.6;
solve(Y,R)

ans =

4

Answer 2

[John D'Errico]

The simple rules of algebra suffice.

As long as R ~= -1 and Y ~= 1, we can solve for R in terms of Y. I suppose the symbolic toolbox would do it if you are that algebraically challenged. I don't wish to do your homework for you, but I would start by multiplying by (1+R), thus the issue with R == -1.

Solve for R. Note that in your example as posed with real Y, the solution will always be real IF one exists. Here I get R = -7/5.

R = -7/5;
-(1-R)/(1+R)
ans =
            6