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Hi, I tried processing data in order to get an xgb.DMatrix object, but I ran into difficulties. All examples found in the xgboost package documentation or Xgboost presentation vignette are...
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I'm looking for examples and analyses of autocorrelation tests performed on cross-sectional data and the issues encountered (data prop for analysis, problems with estimations, etc). Not interested...
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The complete reference is Noether GE: A note on the Kolmogorov-Smirnov statistic in the discrete case. Metrika 7:115-116, 1963'. Basically I'm looking cor citations that prove that...
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Except for econometricians, most of us usually have one or more books they refer to when we want to get a first-hand reference on some basic or advanced topics, and/or get some basic understanding...
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I need to process some data, nothing fancy, crosstabs, means and medians, and I want to automate it as much as possible. So far I use xtabs and SummaryBy from the doBy library. Do you know if...
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I'm writing a book on R and I need a free software that can take crystal-clear pictures of the screen. I use ScreenHunter, but images are not very sharp.
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The third edition of the Data Science International Summer School will take place during 17-26 July 2020 in Predeal, Romania. The goal of the Summer School is to familiarize students with...
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