Re: For Loop Index Problems

[josgau33]

That fixed it! Thanks a lot guys :-)


josgau33 wrote:
> 
> Hello,
> 
> I am having a simple problem with the for loop and its index. Basically,
> here is a simple program to illustrate the problem I am having.
> 
> i=1;
> a=[1 2 3 8 8 8 3 2 1];
> 
> for i=1:length(a)
> i
>   while a(1,i)==8
>   i=i+1;
>   i
>   end
> i
> i=i+1;
> i
> end
> 
> This gives the output shown below:
> i =  1
> i =  1
> i =  2
> i =  2
> i =  2
> i =  3
> i =  3
> i =  3
> i =  4
> i =  4
> i =  5
> i =  6
> i =  7
> i =  7
> i =  8
> i =  5
> i =  6
> i =  7
> i =  7
> i =  8
> i =  6
> i =  7
> i =  7
> i =  8
> i =  7
> i =  7
> i =  8
> i =  8
> i =  8
> i =  9
> i =  9
> i =  9
> i =  10
> 
> So from here, we can see that... When a=8, the while loop is entered, and
> i equals 7 when it leaves the while loop... We then see that i=7 right
> outside of the while loop, and that after i=i+1, i now equals 8. But then,
> the next iteration of the for loop sets i equal to 5, which was the next
> iteration originally (before the while loop was entered).
> 
> My question is... Is there any way to avoid the resetting of the index? Is
> there some sort of for loop where the user is allowed to control the
> index, and not the computer. If not, can anybody show me modifications to
> the code that would solve this problem? I cannot seem to figure it out on
> my own. Suggestions would be helpful too. Thank you,
> 
> Joseph Gauthier
> 

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