Monthly Archives: October 2016

What is wrong with lift curves

October 30, 2016
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What is wrong with lift curves

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 target group for a campaign based on predicted response...

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The Bayesian approach to ridge regression

October 30, 2016
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The Bayesian approach to ridge regression

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 →

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Regular Expressions Exercises – Part 1

October 30, 2016
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Regular Expressions Exercises – Part 1

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 number) thru complex ones (such

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Nobel Laureates – A Closer Look At The Data

October 30, 2016
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Nobel Laureates – A Closer Look At The Data

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 ...

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Nobel Laureates – A Closer Look At The Data

October 30, 2016
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Salvino A. Salvaggio ...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 this is a...

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RProtoBuf 0.4.7: Mostly harmless

October 29, 2016
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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 much nothing else. RProtoBuf provides R bindings for the Google...

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drat 0.1.2: Mostly harmless

October 29, 2016
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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...

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Finding the farthest points in a point cloud

October 29, 2016
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(This article was first published on Johan Larsson - R, and kindly contributed to R-bloggers) To leave a comment for the author, please follow the link and comment on their blog: Johan Larsson - R. R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps,...

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How to add a background image to ggplot2 graphs

October 29, 2016
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How to add a background image to ggplot2 graphs

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 this blog post. if Related PostStreamline your analyses...

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A quick exploration of the ReporteRs package

October 28, 2016
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A quick exploration of the ReporteRs package

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 of documents by using bookmarks within

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