grouping indices based on how close they are

Hi

Lets say, I have an array with indices like this:

a = [11 12 13 25 26 55 56 57]

Is there a nice way of grouping them into three (in this case) groups based on how close they are?

a1 = [11 12 13]; a2 = [25 26]; a3 = [55 56 57]

Best,

Dawid

Answer 1

[Bruno Luong]

If your array is sorted

>> c = mat2cell(a,1,diff(find([true diff(a)>5 true]))); c{:}

ans =

    11    12    13


ans =

    25    26


ans =

    55    56    57

>>