argh, here take my +1 for this mail :p On 25/04/16 14:08, Damien Pollet wrote:

So, ARFF is the file format… I propose that an OO modeling of it should be named the Attribute-Relation Graph Hierarchy

:D

On 25 April 2016 at 13:37, Julien Delplanque <julien@tamere.eu> wrote:

...

Hello everyone,

For a university project in ''Datamining and Datawarehousing'', I have to convert data stored as text files in different formats to the Weka[1] ARFF format[2].

I did it with Pharo of course! :)

So, I wrote this little project [3] to share what I have done with you, just in case someone else needs to export data from Pharo objects to an ARFF string for further analysis with Weka.

Cheers,

Julien

Links:

[1] Weka's website: http://www.cs.waikato.ac.nz/ml/weka/

[2] ARFF format spec: https://weka.wikispaces.com/ARFF

[3] Arff generator for Pharo: https://github.com/juliendelplanque/Arff

Took me 1 hour to create 1 object/concept and the visitor. My classmates probably did it with Python but not in the spirit to share it so I guess it took them less time but it is not reusable... :) Then some time to document, write the baseline and the mail. Julien On 25/04/16 14:09, phil@highoctane.be wrote:

Hello Julien,

I am curious to know how much faster/slower you can do this vs people using other languages.

So?

Phil

On Mon, Apr 25, 2016 at 1:37 PM, Julien Delplanque <julien@tamere.eu> wrote:

...

Hello everyone,

For a university project in ''Datamining and Datawarehousing'', I have to convert data stored as text files in different formats to the Weka[1] ARFF format[2].

I did it with Pharo of course! :)

So, I wrote this little project [3] to share what I have done with you, just in case someone else needs to export data from Pharo objects to an ARFF string for further analysis with Weka.

Cheers,

Julien

Links:

[1] Weka's website: http://www.cs.waikato.ac.nz/ml/weka/

[2] ARFF format spec: https://weka.wikispaces.com/ARFF

[3] Arff generator for Pharo: https://github.com/juliendelplanque/Arff