Almost done, one bug left!

I've just got one bug left to fix and I can't for the life of me get it, I thought my initial while loop should be accounting for this:

??? Attempted to access data(50945,:); index out of bounds because size(data)=[50944,1].

the total length(data) = 50944

data set:

2
31
59.35
12
59.39
2
30
55.11
14
54.82
3
3
78.98
18
68.39
21
10.23
2
30
55.11
14
54.82

 etc. repeating

code:

i=1;sx=1;sy=1;j=1;xs=zeros((length(data)),(1));ys=zeros((length(data)),(1));
m=1;
while i+j < length(data)
    if ceil(data(i+1,:)) == floor(data(i+1,:)) % is the second line of data a channel number?
        n=0;
        n=fix(data(i,:)); % tells how many trigger values there are
        for j=1:2*n % iterates in groups depending on number of triggers, n
            % is the channel an x or a y?
            if ceil(data(i+j,:)) == floor(data(i+j,:))
                if (data(i+j,1) < 16 && data(i+j,1) > -1) % its an x
                    if ceil(data(j+i+1,:)) ~= floor(data(j+i+1,:))
                    x(sx,:) = [data(i+j,:),data(j+i+1,:)];
                    xs(m,:)=xs(m,:)+data(j+i+1,:);
                    j=j+1; sx=sx+1; i=i+1;
                    else
                        j=j+1;
                    end
                else
                    y(sy,:) = [data(i+j,:),data(j+i+1,:)];
                    ys(m,:)=ys(m,:)+data(j+i+1,:);
                    j=j+1; sy=sy+1;
                end
            else
                j=j+1;
            end
        end
        m=m+1;
        i=i+1;
    else
        i=i+1;
    end
    i=i+1;
end

The fix is probably just add in an i or something... but I've been trying to fix this for about an hour and haven't figured it out... thanks in advance for any help.

Answer 1

[the cyclist]

I took the data you listed, and replicated them 3,000 times to create a dataset comparable in size to yours. Your code ran to completion for me, with no errors or warnings. (I checked that it reaches all the conditional structures, too.)

Could you post a minimal dataset that triggers the error?

Answer 2

[Sean de Wolski]

First off, tell us what line the error is on.

if ceil(data(j+i+1,:)) ~= floor(data(j+i+1,:))

I would guess it's on this line since (i+j+1) > length(data) perhaps.