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i've tried to download your zip but i cannot open it. I always get errors. Any chance you could reupload it somewhere?
sure Martin - try this: https://goo.gl/WYnZHO
I of course do not know what your preprocessing or your models look like, but I will say (as the only one who knows the data sets ) that I was getting a boost in performance when I created attributes that split out the date: day of the week and month seemed to help, quarter did not. Other tinkering with the dates may be helpful too...
very nice. I do have a model with 63% but on a different validation. The validation @sgenzer proposes takes how many steps? 500? Even with simple models it takes an hour for me. Are you sure on comm. training? This makes parameter tuning fairly hard.