multiplying real part of a complex number while imaginary part stay tact (Matlab)

Question

I am trying to multiply real part of a complex number to a scalar while the imaginary part stay the same.

For example x= a + bi after multiplying to c result us y= ca + bi .

Any suggestions on procedure?

Answer 1

For this you can use the real and imag functions in MatLab. So the multiplication becomes:

y = real(x) * c + imag(x)*i

real (see documentation ) retrieves a from x and imag (see documentation ) retrieves b from x . Don't forget to multiply with i again ;)