[This article was first published on Reimagined Invention, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here) Want to share [Read more...]

The ggseas package for R, which provides convenient treatment of seasonal time series in the ggplot2 universe, was first released by me in February 2016 and since then has been enhanced several ways. The latest version, 0.4.0, is now on CRAN. The improvements since I last blogged about ggseas include: added the ... [Read more...]

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A number of years ago, whilst I was still working at ENSIS, the consultancy arm of the ECRC at UCL, I worked on a project for the (then) Countryside Council for Wales (CCW; now part of Natural Resources Wales). I don’t recall why they were doing this project, but ... [Read more...]

Blending weather data Scotland and other parts of the UK have some nicely curated open data on road traffic accidents. For individual cases, where and when they happened, how severe they were, the prevailing road conditions, which emergency services w... [Read more...]

Gathering data from the web is one of the key tasks in order to generate easy data-driven insights into various topics. Thanks to the fantastic Rvest R package web scraping is pretty straight forward. It basically works like this; go to a website, find the right items using the selector ... [Read more...]

Blending weather data Scotland and other parts of the UK have some nicely curated open data on road traffic accidents. For individual cases, where and when they happened, how severe they were, the prevailing road conditions, which emergency services were involved and so on. It felt to me like this ... [Read more...]

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The fourth update in the 0.12.* series of Rcpp has now arrived on the CRAN network for GNU R, and has just been pushed to Debian as well. This follows four days of idleness in the incoming/ directory: Word is that the tireless CRAN maintainers were traveling and only covering simpler ... [Read more...]

@jsvine (Data Editor at BuzzFeed) cleaned up and posted a data sets of historical nuclear explosions earlier this week. I used it to show a few plotting examples in class, but it’s also a really fun data set to play around with: categorial countries; time series; lat/long pairs; ... [Read more...]

Choice modeling begins with a researcher "deciding on what attributes or levels fully describe the good or service." This is consistent with the early neural networks in which features were precoded outside of the learning model. That is, choice modeling can be seen as learning the feature weights that recognize ... [Read more...]

Choice modeling begins with a researcher "deciding on what attributes or levels fully describe the good or service." This is consistent with the early neural networks in which features were precoded outside of the learning model. That is, choice modeli... [Read more...]

[1] [2] [3] Over the last 40-50 years, the international spread of the passion for football has revealed as one of the most pandemic social phenomena. Something that was considered as a fun form of national craziness typical of Brazilian, British and Italian people in the 1960s and ’70s is Read More ... [Read more...]

If you're new to the concept of predictive models, or just want to review the background on how data scientists learn from past data to predict the future, you may be interested in my talk from the Data Insights Summit, Introduction to Real-Time Predictive Modeling. In the talk above I ... [Read more...]

The validate package is our attempt to make checking data against domain knowledge as easy as possible. Here is an example. [crayon-56f5bac53c653388423735/] The summary gives an overview of the number of items checked. For an aggregated test, such as the … Continue reading → [Read more...]

googleformr is a CRAN package for collecting data programmatically via Google Forms. For collecting data online through user submissions, Google Forms can be a very convenient way to maintain a lot of control. Trying to use Google Sheets or public folders on Dropbox either requires maintain a lot of credentialling, ... [Read more...]

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Quite some time ago, back in 2011, I wrote a post that used an additive model to fit a smooth trend to the then-current Hadley Centre/CRU global temperature time series data set. Since then the media and scientific papers have been full of reports of record warm temperatures in the ... [Read more...]

Salvino A. Salvaggio [1] [2] [3] In this blog I publish data analysis cases based on the R statistical language. No statistical or mathematical theory here, no discussions of the R language, no software tutorials, but only concrete case studies using existing R tools. To download R code and dataset, click here (4.0 MB). ... [Read more...]