Complex number to polar form

Hi

How do i calculate this complex number to polar form?

z = (10<-50)*(-7+j10) / -12*e^-j45*(8-j12)

Answer 1

[Ameer Hamza]

The number you wrote in not correct according to MATLAB syntax. You can use abs() and phase() to convert complex numbers to polar coordinate

z = 2 + 3j;

r = abs(z);
angle = phase(z);

[Rik]

which phase -all

/MATLAB/toolbox/ident/idobsolete/phase.m
/MATLAB/toolbox/ident/ident/@iddata/phase.m  % Shadowed iddata method

@Spencer Hurst Regarding your flag ("phase() must be out of date"): as you can see, there actually still is a phase function in Matlab. I would suggest using the angle function instead, as that is in the Matlab base instead of a separate toolbox.

%confirm it does what we think it does:
help phase

 PHASE  Computes the phase of a complex vector
 
    PHI=phase(G)
 
    G is a complex-valued row vector and PHI is returned as its
    phase (in radians), with an effort made to keep it continuous
    over the pi-borders.

    Documentation for phase
       doc phase

    Other functions named phase

       iddata/phase

Answer 2

[Steven Lord]

Use pol2cart and cart2pol to convert between the (r, theta) and (real, imag) representations of the complex numbers. Since I'm guessing your angles are in degrees you'll also need deg2rad and rad2deg.