Flip a vector using for
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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.
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Antworten (2)
Andrei Bobrov
am 15 Mär. 2018
Bearbeitet: Andrei Bobrov
am 15 Mär. 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
am 15 Mär. 2018
Bearbeitet: James Tursa
am 15 Mär. 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)
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