> Thanks for valued response.
> Actually, In the following paper I have found the
> cutoff utility concept which is the product of
> minSup and external utility. Also, authors
> justified the external and internal utility values
> like this "The internal and external utilities of
> the items are synthetically generated by SPMF
> I have following two concern about this:-
> 1) Please let me know where can I find that
> library which produces external and internal
The SPMF library is here: http://www.philippe-fournier-viger.com/spmf/
The tool for generating utility values in SPMF generates random utility values and does not explicitly generate the external utility and the internal utility. The tool just put directly utility values generated using a random number generator.
This is the documentation for that tool:
> 2) If we use randomly generated value for external
> and internal utility then What will be the
> guarantee that total transaction utility in the
> database will be same with the produced TU from
> the enternal and internal utility. Because we will
> be generating the EU and IU synthetically. Its
> produced TU would not be same with TU which is
> already in databases.
The tool in SPMF is used to add utility values to a database that has no
utility values yet. So because there is no utility values, then there is no conflict or problem with using this tool to add utility values. The tool will generate utility values and then for each transaction, the TU value is just the sum of the utility values in the transaction.
In my papers, I always use the datasets from the SPMF library. But in the paper that you mention, I am not the main author. I am instead a co-author that collaborated on the project. I am not sure about the details of how the experiments were carried in that paper. And I forgot.
> Please clear this point, it makes my confused.
> Thanks in advance.
Hope that this is more clear