Flip a vector using for
6 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
I'm a MATLAB beginner in need of some help. I need to flip a vector so that it goes in reverse. Basically, [1 2 3] becomes [3 2 1]; Here's what I've got:
vector=[1:12]
A=0;
j=12;
for i=1:12
A=vector(i);
vector(i)=vector(j);
vector(j)=A;
j=j-1;
end
vector
I'm not really sure why it's not working since this seems like the logical way to do it.
0 Commenti
Risposte (2)
Andrei Bobrov
il 15 Mar 2018
Modificato: Andrei Bobrov
il 15 Mar 2018
out = flip(yourvector);
with loop (no use)
out = zeros(size(yourvector));
k = 1;
for ii = numel(yourvector):-1:1
out(k) = yourvector(ii);
k = k + 1;
end
James Tursa
il 15 Mar 2018
Modificato: James Tursa
il 15 Mar 2018
Because you are exchanging elements, you wind up flipping the vector twice, which gets it back to the original state. Instead, just run your for-loop through 1/2 of the vector so that the elements are only flipped once. E.g.,
for i=1:floor(numel(vector)/2)
Vedere anche
Categorie
Scopri di più su Matrix Indexing in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!