On Sat, Jun 27, 2015 at 12:16 AM, Pierre CHANSON <chans.pierre@gmail.com> wrote:

Hola todos,

These days I am working on compete with R. I am taking the datasets and examples from http://cran.r-project.org/doc/contrib/Zhao_R_and_data_mining.pdf and make it with Roassal even better ! Or almost... ;)

First chapter first pages, the histograms... In Roassal they were not working so well.

So lately I restructured the RTDistribution package. This, by default make a classical frequency distribution, with an optimized number of classes. The method #strategyBlock: allows to change the strategy for the distribution.

I also worked on the RTHistogramSet and method #histogram of SequenceableCollection to improve a bit the looking. There is still here some work to do but at least the histogram works well and looks fine.

We worked with Alejandro on the algorithm of frequency distribution to make it efficient compared to the classic one (Only one iteration on datas during the algo itself).

Here are some examples, don't hesitate to try a bit and give me feedbacks if any bugs, so I can move on the next graphs ;)

#(5 3 8 6 5 4 2 9 1 2) histogram.

#(1 2 3) histogram.

#(555 1 1 2) histogram.

((1 to: 1000) collect: [:i | i atRandom ]) histogram.

Also, I found this page and thought it was really nice animations !! http://bost.ocks.org/mike/algorithms/

cheers,

Pierre

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Serge Stinckwich
UCBN & UMI UMMISCO 209 (IRD/UPMC)
Every DSL ends up being Smalltalk
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