discretization

I have set of data and i want to set cut off point for it,i used CACC ALGORITHM ,

http://www.mathworks.com/matlabcentral/fileexchange/24343-discretization-algorithms-class-attribute-contingency-coefficient/content/CACC/CACC_Discretization.m

in that the cut off point are too close for my data set,i need the cut off range to increase ,please help

for example i get values as

DiscretizationSet1 =

   18.5000
   19.5000
   20.5000
   21.5000
   22.5000
   23.5000

i need this range to increase

my data set is

http://www.sendspace.com/file/4a6zkz