Move to next and previous iteration in for loop on button press

Hello,

I am playing a video inside a for loop (for frame = startframe:endframe) and the image updates for each iteration in the for loop.

I want the user to be able to move forward and backward inside the loop depending on which button is pressed. Say "left arrow key" moves to previous iteration and "right arrow key" moves to next iteration.

How can I do this?

Thanks!

Answer 1

[KSSV]

%Right 
for i = 1:10
    fprintf('%d\n',i)
end

1
2
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5
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7
8
9
10

% Left
for i = 10:-1:1
    fprintf('%d\n',i)
end

10
9
8
7
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5
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3
2
1

[Konvictus177]

I want it to be interactive and to move forward/backward depending on a button press. I do not want to go thorugh the whole loop.

[KSSV]

When you press the button get the values or some number and then decide whether to go left or right.

[Konvictus177]

How would I change within the loop. Let's say I am at index 40 in my loop and now I want to go left 39,38,37 now I want to go right again 38,39,40, etc.

Can you show an example?

Thanks.