Reverse an array by for loop

Hi i got this array : a=[1 2 3 4 5] and i want to reverse it by for loop so it will be a=[5 4 3 2 1]

Thanks

Answer 1

[Wayne King]

Why a for loop?

 a = [1 2 3 4 5] ;
 b = fliplr(a);

If you must with a for loop

for ii = 1:length(a)
   b(ii) = a(length(a)-ii+1);
end

[Mohammed]

IT does not work.. when i input this in the matlab it gives me nothing

[Wayne King]

 a = [1 2 3 4 5] ;
 for ii = 1:length(a)
   b(ii) = a(length(a)-ii+1);
 end

It absolutely works. Just copy and paste the entire code snippet above into the command window.

[Matt Fig]

Wayne, Mohammed needs to read the Getting Started section of the documentation. As far as I can tell, he thinks it doesn't work because of the semi-colons. See the comments on my answer for more insight.

Answer 2

[Doug Hull]

a = fliplr(a)

[Mohammed]

it must be for loop

[Doug Hull]

why?

Answer 3

[Matt Fig]

An in-place FOR loop would look like:

a = 1:10;
L = length(a);

for ii = 1:L/2
   T =  a(L-ii+1);
   a(L-ii+1) = a(ii);
   a(ii) = T;
end

[Mohammed]

i put this in the matlab but i do not know what's wrong it does not give me an output

[Matt Fig]

You need to read the "Getting Started" section of the documentation. Copy-paste the code I gave into the command window and it will reverse the elements of a. Nothing is wrong, you just didn't look at a after the code ran!! To look at the result, type:

a

at the command window.....