GROUPFIND

Find groups of data from a vector.

Extract groups of data from a vector. For example:
x=[0 1 2 2 1 0 -1 1 3 5 3];
groupfind(x>0)
ans =

2 5
8 11

In this case, the first group is from indices 2 to 5 and the second is from indices 8 to 11.