Separating a list of numbers by their first few digits?

I have a list that has some numbers that start with similar digits, and I want to separate the list by their first couple digits.

Ex. [3345 5543 3346 3347 5555 5567 3355 5532]

And I need a vector of values starting with 33 [3345 3346 3347 3355] and a vector of values starting with 55 [5555 5543 5567 5532].

Answer 1

[KSSV]

   d = [3345 5543 3346 3347 5555 5567 3355 5532] ;

   digits = dec2base(d,10) - '0' ;

   [c,ia,ib] = unique(digits(:,1:2),'rows') ;

   iwant = cell(size(c,1),1) ;

   for i = 1:size(c,1) 
       iwant{i} = d(ib==i) ;
       iwant{i}
   end

Answer 2

[Star Strider]

Using the discretize (link) function

V = [3345 5543 3346 3347 5555 5567 3355 5532];
Vu = unique(fix(V/100));                                            % Divide By 100 To Define Categories
[idx,edges] = discretize(V,numel(Vu));                              % ‘discretize’ Introduced in R2015a
Out = accumarray(idx(:), V(:), [], @(x){x});                        % Desired Result
Result = [Out{:}]                                                   % Display Result

Result =
        3355        5567
        3346        5555
        3347        5532
        3345        5543