The first part of our Marketing Analytics Using R course covers campaign analysis with test- and control groups and campaign optimisation using lift curves and predicted responses. Among the many topics covered, we discuss what is wrong with lift curves. They are a standard tool in marketing to select a ... [Read more...]

In a previous post, we demonstrated that ridge regression (a form of regularized linear regression that attempts to shrink the beta coefficients toward zero) can be super-effective at combating overfitting and lead to a greatly more generalizable model. This approach… Continue reading → [Read more...]

A common task performed during data preparation or data analysis is the manipulation of strings. Regular expressions are meant to assist in such and similar tasks. A regular expression is a pattern that describes a set of strings. Regular expressions can range from simple patterns (such as finding a single ... [Read more...]

The ritual is now well established: since more than a century, every year on early October, the STEM small-world but also the media and many science-&-technology aficionados and enthusiasts wait for the Nobel Prizes announcement. As the 2016 round of Nobel laureates was announced a few days ago only, perhaps ... [Read more...]

Salvino A. Salvaggio [1] [2] ...The ritual is now well established: since more than a century every year on early October, the STEM small-world but also the media and many science-&-technology aficionados and enthusiasts wait for the Nobel Prizes announcement. As the 2016 round of Nobel laureates was announced a few days ... [Read more...]

CRAN requested a release updating any URLs for Omegahat to the (actually working) omegahat.net URL. The RProtoBuf package had this in one code comment (errr...) and on bibfile entry. Oh well -- so that caused this 0.4.7 release which arrived on CRAN today. It contains the requested change, and pretty ... [Read more...]

CRAN requested a release updating any URLs for Omegahat to the (actually working) omegahat.net URL. So that caused this 0.1.2 release which arrived on CRAN yesterday. It contains the requested change along with one or two other mostly minor changes w... [Read more...]

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

When producing so called infographics, it is rather common to use images rather than a mere grid as background. In this blog post, I will show how to use a background image with ggplot2. Packages required The following code will install load and / or install the R packages required for ... [Read more...]

The package ReporteRs has been getting some play on the interwebs this week, though it’s actually been around for a while. The nice thing about this package is that it allows writing Word and PowerPoint documents in an OS-independent fashion unlike some earlier packages. It also allows the editing ... [Read more...]

To stay on top of R in the news, we’re sharing some stories related to R published last week. The R Graph Gallery Has Made a Combeback(Yan Holtz) I must admit, the first edition of this gallery must have been before my time! Announced here, I was immediately ... [Read more...]

There's a new e-book available to download free from Microsoft Academy: Data Science with Microsoft SQL Server 2016. This 90-page e-book is aimed at data scientists who already have some experience in R, but want to learn how to use R wirth SQL Server. The book was written by some of ... [Read more...]

[Read more...]

.fusion-fullwidth-1 { padding-left: px !important; padding-right: px !important; }by Joseph Rickert Computer Age Statistical Inference: Algorithms, Evidence and Data Scienc... [Read more...]

3,000+ voting intention surveys Like many others around the world, I have been watching with interest the democratic process in the United States of America. One of the most influential and watched websites is FiveThirtyEight.com, headed by Nate Silv... [Read more...]

[Read more...]

1 Required packages 2 Data preparation2.1 faithful dataset 2.2 Random uniformly distributed dataset 3 Why assessing clustering tendency? 4 Methods for assessing clustering tendency4.1 Hopkins statistic4.1.1 Algorithm 4.1.2 R function for computing Hopkins statistic 4.2 VAT: Visual Assessment of cluster Tendency4.2.1 VAT Algorithm 4.2.2 R functions for VAT 5 A single function for Hopkins statistic and VAT 6 Infos Clustering ... [Read more...]

A ‘tidyverse’ approach to simulation models I am a big fan of Rstudio’s (mainly led by Hadley Wickham) series of R packages known as the ‘tidyverse’. The packages modernise much of R’s functionality to better deal with moderately large da... [Read more...]

I am so pleased to announce that tidytext 0.1.2 is now available on CRAN. This release of tidytext, a package for text mining using tidy data principles by Dave Robinson and me, includes some bug fixes and performance improvements, as well as some new ... [Read more...]

[Read more...]