Extract a matrix out of another matrix with logiccal expression

Hi

I have a matrix like F=[7 5;2 7;3 5;4 9;5 3;6 1;2 5;8 2;1 8;10 1]. I want to extract those rows in which the elements in column 1 are bigger than 5 like B=[7 5;5 3;6 1;8 2;10 1].

 It would be better If I can do it with loop function like for or if.
Thank you in advance.
Amir

Answer 1

[Thorsten]

F(F(:,1) >= 5, :);

[Amirhossein]

thank you for your quick answer. is it possible that I code it with loop function?

Answer 2

[Andrei Bobrov]

Your homework?

out = [];
for jj = 1:size(F,1)
    if F(jj,1) >= 5
        out = [out; F(jj,:)];
    end
end

[Amirhossein]

Thank you very much. Actually I am beginner in Matlab but it is not homework.