Note: When I started writing this blog post, I encountered a bug and filed a bug report that I encourage you to read. The responsiveness of the developer was exemplary. Not only did Zhuo solve the issue in record time, he provided ample code snippets to illustrate the solutions. Hats ... [Read more...]

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Yesterday I released an ebook on Leanpub, called Modern R with the tidyverse, which you can also read for free here. In this blog post, I want to give some context. Modern R with the tidyverse is the second ebook I release on Leanpub. I released the first one, called ... [Read more...]

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This blog post is an excerpt of my ebook Modern R with the tidyverse that you can read for free here. This is taken from Chapter 8, in which I discuss advanced functional programming methods for modeling. As written just above (note: as written above in the book), map() simply applies ... [Read more...]

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I was recently asked how to go about matching several datasets where different samples of individuals were interviewed. This sounds like a big problem; say that you have dataset A and B, and that A contain one sample of individuals, and B another sample of individuals, then how could you ... [Read more...]

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Writing functions that take data frame columns as arguments is a problem that most R users have been confronted with at some point. There are different ways to tackle this issue, and this blog post will focus on the solution provided by the latest release of the {rlang} package. You ... [Read more...]

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I have recently been confronted to a kind of data set and problem that I was not even aware existed: intermittent demand data. Intermittent demand arises when the demand for a certain good arrives sporadically. Let’s take a look at an example, by analyzing the number of downloads for ... [Read more...]

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Lately I’ve been interested in trying to cluster documents, and to find similar documents based on their contents. In this blog post, I will use Seneca’s Moral letters to Lucilius and compute the pairwise cosine similarity of his 124 letters. Computing the cosine similarity between two vectors returns how ... [Read more...]

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The creation of this blog post was prompted by this tweet, asking an age-old question: @spacemacs— Bruno Rodrigues (@brodriguesco) May 16, 2019 This is actually a very important question, that I have been asking myself for a long time. An IDE, and plain text editors, are a very important tools to anyone ... [Read more...]

The creation of this blog post was prompted by this tweet, asking an age-old question: @spacemacs— Bruno Rodrigues (@brodriguesco) May 16, 2019 This is actually a very important question, that I have been asking myself for a long time. An IDE, and plain text editors, are a very important tools to anyone ... [Read more...]

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Today I’ve removed my system’s R package and installed MRO instead. While re-installing all packages, I’ve encountered one of the most frustrating error message for someone installing packages from source:

Error : /tmp/Rtmpw60aCp/R.INSTALL7819efef27e/xml2/man/read_xml.Rd:47: unable to load shared object
'/usr/lib64/R/library/xml2/libs/xml2.so': 
libicui18n.so.58: cannot open shared object file: No such file or directory ERROR: 
installing Rd objects failed for package ‘xml2’

This library, libicui18n.so.58 is a pain in the butt. However, you can easily install ... [Read more...]

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I am currently working on a package for the R programming language; its initial goal was to simply distribute the data used in the Card and Krueger 1994 paper that you can read here (PDF warning). However, I decided that I would add code to perform diff-in-diff. In my previous blog ... [Read more...]