I don't have the package for `nlfilter` and I didn't quite follow [this example](https://stackoverflow.com/questions/2202463/sliding-window-algorithm-for-activiting-recognition-matlab).

I have a really simple function `fun` and I want to apply it to a moving window of an array. The array is `Nx1`, and I want to look at length `k` intervals, say. So for `N=10` and `k=3` and `fun = @(x) min(x);` I would get

```
A = [13 14 2 14 10 3 5 9 15 8];

filter(A,k,fun) = [2 2 2 3 3 3 5 8];

```

Here I only want to look at indices 1,2,3 then 2,3,4 then ... then 8,9,10, so the final sequence is length 7. I can do this easy with a for loop, but I have no idea how to vectorize it for Matlab. Help, please. Thanks.