Put vectors of different lengths into cells

I have three vectors. They all have 466 elements (466x1 vectors).

Vector1= the value 173 on 224 rows followed by 242 zeros

Vector2= zeros on 224 rows followed by the value 174 on 136 rows followed by 106 zeros

Vector 3= zeros on 360 rows and the value 178 on 106 rows

I put these vectors in IDmatrix=[Vector1 Vector2 Vector3]

Each of the elements in the vectors represent a date in (tripStats.stop_time_string) e.g. '"2010-07-03 08:51:37"' that is specific for each row and value (173,174 and 178)

What I want is to put all the dates in a single cell array. I have tried the following:

n=3;

M=cell(n,1);

ID=[173 174 178];

for o=1:n

for l=1:466

if IDmatrix(l,o)==0

break

elseif IDmatrix(l,o)==ID(o)

StopDatev=[StopDatev ;datevec(tripStats.stop_time_string(l,:))];

end

end

M{o}=StopDatev

StopDatev=[];

end

The result is

{224×6 double}

{ 0×0 double}

{ 0×0 double}

what I want to accomplish is

{224×6 double}

{ 136×6 double}

{ 106×6 double}