i want to change the size of vector in a loop

here is my code, i m very new to matlab so please help

for a=2*n:-1:1

 [a,1]=size(w)

end

i want to extract min value of w each time for that i've to change the vector size every time how can i do that?

[Walter Roberson]

What do _you_ mean by the minimum of a vector of complex numbers?

Answer 1

[Oleg Komarov]

You don't have to change any size but you can index the values of w to take the moving minimum:

w = rand(20,1);
n = numel(w)/2;

out = zeros(n,1);
for a = 0:2*n-1
    out(a+1) = min(w(1:end-a));
end

The first element of out is the min on the entire array - 2*n -, the next is the first n*2-1 elements and so on.

[Sudhanshu kher]

sir but my w value is a complex no.

basically its a eigenvalue, so i want that my eigenvectors should arrange themselves according to the order of w

[Oleg Komarov]

Then you have to be clear about what you're trying to achieve: http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer