Using fprintf for complex numbers

Hi, I have

Z1= sqrt(3) * exp((pi*i)/4)
Z2= 2 * exp((pi*i)/6)
Z3= sqrt(3) * exp((3*pi*i)/4)
Z4= 2 * exp(pi*i)
Z5= 2 * exp(-pi*i)

And I would like something like

        Real        Complex
Z1  1.2247 + 1.2247i
Z2 1.7321 + 1.0000i
Z3 -1.2247 + 1.2247i
Z4  -2.0000 + 0.0000i
Z5 -2.0000 - 0.0000i

Using fprintf, I would think...

Thanks for your help!

Answer 1

[KALYAN ACHARJYA]

One Way:

Z1= sqrt(3) * exp((pi*i)/4)
fprintf('%f + %fi',real(Z1),imag(Z1))

More:

Z1= sqrt(3) * exp((pi*i)/4);
Z2= 2 * exp((pi*i)/6);
Z3= sqrt(3) * exp((3*pi*i)/4);
Z4= 2 * exp(pi*i);
Z5= 2 * exp(-pi*i);
disp('     Real   Complex')
fprintf('\nZ1  %.4f + %.4fi',real(Z1),imag(Z1));
fprintf('\nZ2  %.4f + %.4fi',real(Z2),imag(Z2));
fprintf('\nZ3  %.4f + %.4fi',real(Z3),imag(Z3));
fprintf('\nZ4  %.4f + %.4fi',real(Z4),imag(Z4));
fprintf('\nZ5  %.4f + %.4fi',real(Z5),imag(Z5));

Result:

[Savannah Roemer]

You're the real MVP!

Thanks so much!

S

[KALYAN ACHARJYA]

No Savannah, those MPVs are my Guru here.. continually they are teaching me .

Specially @Walter Roberson, @Image Analyst @Madhan @Jan .and...many more....

Anyway thanks for your kind words!

Answer 2

[Adam Danz]

Another alternative is to use num2str which supports conversion of complex numbers to strings.

a = -2*sqrt(-3)+5/3

a = 1.6667 - 3.4641i

num2str(a)

ans = '1.6667-3.4641i'

num2str(a, 2)  % specify precision

ans = '1.7-3.5i'

You would enter this as a string in fprintf

ijstr = num2str(a,3); 
fprintf('%s %s', 'Z1', ijstr)

Z1 1.67-3.46i

Note that this method may return strings in undesired formats such as,

num2str(160, 2)

ans = '1.6e+02'

Answer 3

[Walter Roberson]

fprintf() always ignores imaginary components of numbers. You need to ask to output the real() and imaginary() components separately,

fprintf('%2s %7.4f %+7.4fi\n', 'Z1', real(Z1), imag(Z1))