MATLAB: Sorting array with condition (paths sorting)

matrixsortsort function

i want sort function to sort the element of matrix except the 1&2 column still fixed. depending at the length of each row (except 0)
like that
a=[1 2 5 2 1 0 0          
   1 2 3 4 0 0 0
   1 2 4 0 0 0 0
   1 3 2 0 0 0 0
   1 3 3 1 4 0 0 
   1 3 4 5 0 0 0
   2 1 4 5 0 0 0
   2 1 3 0 0 0 0]
the first row contain 3 element (after 1&2 column except 0)
the second row contain 2 element
the third row contain 1 element
after sorting
a= [ 1 2 4 0 0 0 0
     1 2 3 4 0 0 0
     1 2 5 2 1 0 0
     1 3 2 0 0 0 0
     1 3 4 5 0 0 0
     1 3 3 1 4 0 0
     2 1 3 0 0 0 0
     2 1 4 5 0 0 0]

Best Answer

 b=[a,sum(logical(a),2)]; 
 result=sortrows(b,[1,2,size(b,2)]); 
 result(:,end)=[]
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