When I wrote the original post, I wasn’t planning on writing a follow-up. Certainly not the week after. But what a difference a week can make in a dynamic system like the US stock market. While re-running the computations testing the latest version of RStudio, I noticed something surprising – ... [Read more...]

Motivation The first part left an open door to analyze Rick and Morty contents using tf-idf, bag-of-words or some other NLP techniques. Here I'm also taking a lot of ideas from Julia Silge's blog. Note: If some images appear too small on your screen you can open them in a ... [Read more...]

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Let’s start with a few observations about linear models. The usual discussion posits a target variable y of length N and a design matrix X with p columns (of full rank, say) and N rows. The linear model equation can be written and the least squ... [Read more...]

How much pollution reduction do we get from a MWh electricity produced by wind or solar power? In principle, this corresponds to the avoided pollution of a fossil fuel plant that reduces its output due to the higher production of renewable electricity.... [Read more...]

Here's a refresher on the history of the R project: 1992: R development begins as a research project in Auckland, NZ by Robert Gentleman and Ross Ihaka 1993: First binary versions of R published at Statlib [see update, below] 1995: R first distributed as open-source software, under GPL2 license 1997: R core group formed 1997: ... [Read more...]

20.10.2017 Beside a massive of amount of R packages and ImageJ plugins Bio7 can be extended with Eclipse plugins useful for data science and programming. Some of them could also be very useful for R related developments (e.g., to develop R packages or distribute Shiny apps). Installation of Eclipse Plugins ... [Read more...]

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Week76 Gold Mining and Fantasy Football Projection Roundup now available. Go get that free agent gold! The post Gold-Mining – Week 7 (2017) appeared first on Fantasy Football Analytics. [Read more...]

There are three main ways to acquire corpus data using R that I will introduce you to: direct download, package interfaces, and web scraping. In this post we will start by directly downloading a corpus as it is the most straightforward process for the novice R programmer and incurs the ... [Read more...]

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Practical advices about customizing code highlighting on web pages with highlight.js. Prologue While creating this site I had to encounter the topic of highlighting code on web pages. I decided to do that with the help of highlight.js functionality. After picking a style with R in mind, I ... [Read more...]

While there are hundreds of excellent books and websites devoted to R, the canonical source of truth regarding the R system remains the R manuals. You can find the manuals at your local CRAN mirror and on your laptop as part of the R distribution (try Help __ Manuals in RGui, ... [Read more...]

At Plotly, we are commonly asked about thematic maps — especially county-level choropleth maps. This style of map provides a visual illustration of variation across a geographic area. Some pertinent uses are population density, economic measurements, crime statistics, and election results. With Plotly, there are multiple ways to bring county-level choropleths ... [Read more...]

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One of the specialist smoother types in the mgcv package is the Markov Random Field (MFR) smooth. This smoother essentially allows you to model spatial data with an intrinsic Gaussian Markov random field (GMRF). GRMFs are often used for spatial data measured over discrete spatial regions. MRFs are quite flexible ... [Read more...]

Motivation On a previous post I explained how to install R on Ubuntu 16.04 without further complications. Now here are the equivalent steps on Ubuntu 17.10. The presented script also installs Java and common packages as I wrote this for a fresh install... [Read more...]

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Now with new vignettes ... - A new update of the R-package RLumModel was released on 13th October 2017. The update includes some new vignettes and all vignettes are now written in HTML. An overview over all changes can be found at the NEWS.... [Read more...]