Select a certain number of mine Vector Members in MATLAB

Hi

I have a 40 x 1 vector. I want to find the location of 20 smaller components of this vector. The position of these members is considered.

Thanks for your guidance

Answer 1

[KSSV]

Let v be your vector. You can arrange them from small to big order i.e in ascending order and then pick first twenty elements.

[val,idx] = sort(v) ; 
val(1:20)  % values 
idx(1:20)  % indices 

[lech king]

thank you

But for me, their position is important. By arranging the vector, their original positions change

Because the goal is to understand the position of these members and then using their position number from another matrix I will select the corresponding rows

[KSSV]

You already have the indices in your hand as idx which corresponds to original vector. This is not a problem. The positions are according to vector v.

[lech king]

Thank you very very much