Hello all, So you have to find the largest section of zeros in a vector and then find the length of those zeros and there starting position... For example:

x = [1 2 3 4 5 6 7 8 9 0 0 0 0 0 0 0 0 0 9 8 7 6 5 4 3 2 1];
%then the output is:
LP = [9 10] %[Length Position]

%Or another example:

x = [1 0 3 49 3 2 232 3 0 0 0 0 0 0 8 290 0 0 0 12 323 34];
%then the output is:
LP = [6 9]

%Or another example:

x = [1 1 0 0 0 0 0 0 0 1 1 1 1 1 1 0];
%then the output is:
LP = [7 3];

Have Fun!