How to eliminate numbers without imaginary part?

I am trying to keep just the complex numbers.

a =[
    2.70810968
    2.45396925
    1.13928251
   -4.04946201
    0.8829 - 0.13089*i
    0.1308*i + 0.8829
    0.15285*i - 2.00890
   -0.1528510*i - 2.0089069]

Thanks for any help

Answer 1

[Walter Roberson]

format long g
a =[
    2.70810968
    2.45396925
    1.13928251
   -4.04946201
    0.8829 - 0.13089*i
    0.1308*i + 0.8829
    0.15285*i - 2.00890
   -0.1528510*i - 2.0089069]

a = 8×1

2.70810968 + 0i 2.45396925 + 0i 1.13928251 + 0i -4.04946201 + 0i 0.8829 - 0.13089i 0.8829 + 0.1308i -2.0089 + 0.15285i -2.0089069 - 0.152851i

●

b = a(imag(a) ~= 0)

b = 4×1

0.8829 - 0.13089i 0.8829 + 0.1308i -2.0089 + 0.15285i -2.0089069 - 0.152851i

●

[Ko Fa]

Thank you almighty Walter