Today, data.tree 0.1.6 was published to CRAN. It lets you manage hierarchical data, convert to and from data.frame, and OO-style decorate nodes in your tree with functions and attributes. Read the ID3 example, or the introduction vignette for more info... [Read more...]

Most people probably know this, but sometimes even I forget that there is the great Rseek.org. Purisitc as google itself, it works basically like a filter on google searches, to return only R-relevant content. This is very useful if you need to perform a specific task. For example, recently ... [Read more...]

  F# made pipes popular among data scientists, and the magrittr package brought pipes to R. For example, with magrittr, you could write: [crayon-5532c01154e7a698823689/] instead of [crayon-5532c01154e80418780039/] For example: [crayon-5532c01154e85653101897/] becomes: [crayon-5532c01154e89139820003/] or even (to take it to the extreme): [crayon-5532c01154... [Read more...]

What is git? Git is a version control system, and the best I have worked with for that matter. 15 years ago, I was happy when my company decided to migrate from RCS to SVN. Branching became simple, and many daily problems just disappeared. So I shuned other source control versioning ... [Read more...]

For many years as an R user, I didn’t care about environments. To run your statistics, you only very rarely need them. Until you come accross your first environmental concerns… For me, that was in relation with reference classes and R6 objects. Suddenly, everybody was talking about env, and ... [Read more...]

If you have used R before, then you surely have come across the three dots, e.g. [crayon-55343e020a0ff482644779/] In technical language, this is called an ellipsis. And it means that the function is designed to take any number of named or unnamed arguments. By the way, the ... [Read more...]