Category Archives: General Programming
Improving Adaboosting with decision stumps in R
Adaboosting is proven to be one of the most effective class prediction algorithms. It mainly consists of an ensemble simpler models (known as “weak learners”) that, although not very effective individually, are very performant combined. The process by which these … Continue reading
Posted in General Programming, Machine Learning, R, Uncategorized
Tagged ada, adaBoosting, adaStump, decision Stumps, Machine Learning, R
2 Comments
From JSON to Tables
“First things first”. Tautological, always true. However, sometimes some data scientists seem to ignore this: you can think of using the most sophisticated and trendy algorithm, come up with brilliant ideas, imagine the most creative visualizations but, if you do not know … Continue reading
Posted in Data Processing, General Programming, R
Tagged animated graphs, data processing, Data processing in R, Data Science, Data wrangling, ddply, JSON, JSON in R, JSON to tables, plyr, R, tables
3 Comments
Quick guide to parallel R with snow
Probably, the most common complains against R are related to its speed issues, especially when handling a high volume of information. This is, in principle, true, and relies partly on the fact that R does not run parallely…. unless you … Continue reading
Posted in General Programming
Tagged apply r, clusterExport, lapply, parallel computing, parallel R, parallelisation, parApply, parLapply, parRapply, parSapply, R, sapply, snow r, vapply
12 Comments
A new Sudoku Solver in R. Part 1
Sudoku is nowadays probably the most widespread puzzle game in the world. As such, it has an interesting variety of solving techniques, not just with paper and pencil but also with computers. Of course, I am not the first one … Continue reading
My Data Atelier 