matlab - get number of element greater than 0 in column -

in matrix, want number of element in column has value greater 0. example have matrix that;

1  2  4  5 0  0  1  2 1  1  1  1  xi = number of element greater 0 in column i.  then, x1=2, x2=2, x3=3, x4=3 

but must without loop. (id use loop, computation time gets high)

if matrix a, do:

x = sum(a>0,1); 

each element of x contain number of elements greater 0 in column.

best