Help!

How to find mutual numbers in 2 different vectors and replace them?

I have this situation:

```
2016 2059 43
2362 2450 88
2451 2474 25
2475 2684 36
3301 3332 31
```

I would like to get start and end when the colum 1 is different from the second column by 1 or zero and the column number 3 has to add the value as in the following example. im sorry for my bad explanation guys.

Here is the output that i would like to get

```
2016 2059 43
2362 2684 149
3301 3332 31
```

This answer is about as clear as your question :-)

```
x = [ 2016 2059 43
2362 2450 88
2450 2474 25
2474 2684 36
3301 3332 31 ];
[~, ii] = ismember(x(:,2),x(:,1));
jj = ~ii;
kk = sum(jj)+1+flipud(cumsum(flipud(-jj)));
ll = true(size(x,1),1);
ll(nonzeros(ii)) = false;
result = [ x(ll,1) x(jj,2) accumarray(kk,x(:,3)) ];
```

This gives:

```
result =
2016 2059 43
2362 2684 149
3301 3332 31
```