Index out of bounds in a for loop

I am trying to loop till the length of Ytotal. But inside the loop some of the elements are getting deleted as the conditions are met. So , the length of Ytotal should be adjusted accordingly. But, still i am getting the error "index out of bounds" . Could anyone suggest me where i am wrong. thanks

    for aa = 1:length(Ytotal)
                    if Ytotal(aa) > ymean+yerrorstd;
                        Ytotal(aa)=[];
                        x(aa)=[];
                    else
                        Ytotal(aa)=Ytotal(aa); 
                        x(aa)=x(aa);
                    end
            end

[Guillaume]

Ytotal(aa)=Ytotal(aa); 
x(aa)=x(aa);

Are you aware that these two lines don't do anything* and could be omitted? You're just asking matlab to copy something into the same location it came from.

*unless your ytotal and x are instances of a class for which you've redefined subsasgn to perform something other than a straight copy, which would be very evil to do!

Answer 1

[James Tursa]

Run your loop backwards so that the reduced indexing is not a problem (not very efficient btw):

    for aa = length(Ytotal):-1:1

Or just eliminate the loop entirely:

idx = Ytotal > ymean + yerrorstd;
Ytotal(idx) = [];
x(idx) = [];

[HIRAKJYOTI BASUMATARY]

thanks a lot sir. i solved the code using while loop . But , thanks a lot for the information. I will definitely keep it in mind

[Jan]

@HIRAKJYOTI BASUMATARY: Note that shrinking an array iteratively is not efficient. James' vectorized version is much nicer and faster.