Find smallest imaginary values of a vector of real and complex number

I have a vector of real and complex number, and without using a routine i was wondering if there is a comand to find the numbers with smallest imaginary part and their index in the vector. So for example if the vector is v = [1 2 3 4+5i 6+7i 8 9+10i] the output that i want (if i want for example the 2 smallest) is

b = [4+5i 6+7i] and i = [4 5].

[Guillaume]

Aren't 2, 3, and 8 the complex numbers with the smallest imaginary part (equal to 0)?

[Paolo Bighignoli]

Hi Guillaume, yes they are the ones with the smallest part but sorry if i didn't explained exactly. I'm searching for the smallest but also >0.

Answer 1

[Adam]

Something like this would do it, albeit with some better variable naming and handling of error cases.

[~, idx] = sort( nonzeros( imag( v ) ) );
imagIdx = find( imag( v ) ~= 0 );

n = 2; % The number of smallest to extract
i= imagIdx( idx(1:n) );

b = v( :, i);

[Paolo Bighignoli]

Thank you Adam it's exactly what i was searching for.

Answer 2

[KSSV]

v = [1 2 3 4+5i 6+7i 8 9+10i] ;
[val,idx] = sort(imag(v)) ;
iwant = v(idx(val~=0))