Fairly often, a coworker who is strong in Excel, but weak in writing code will come to me for help in special details about customers in their datasets. Sometimes the reason is to call, email, or snail mail a survey, … Continue reading →
06.03.2015 For the upcoming EclipseCon 2015 where I present the Bio7 application I created an overview video (see below) which summarizes some of the main Bio7 functionality. This time...
Beautiful HTML tables of linear models In this blog post I’d like to show some (old and) new features of the sjt.lm function from my sjPlot-package. These functions are...
I've long been a fan of "How to shoot yourself in the foot" jokes. Having shot myself in the foot with different programming languages -- particularly with C -- I...
News that Microsoft will acquire Revolution Analytics has raised interest about R among SQL Server and .NET developers and administrators. Simple-Talk is an online technical journal and hub for a...
Evidently, preference is contextual, or so The Hershey's Company claims in their advertising. I agree and will not repeat the argument made in a previous post on incorporating preference...
In our data-science class, after discussing limitations of the logistic regression, e.g. the fact that the decision boundary line was a straight line, we’ve mentioned possible natural extensions. Let...
Nathan Uyttendaele has written a great beginner’s guide to speeding up your R code. Abstract: Most calculations performed by the average R user are unremarkable in the sense that...
A kind reader directed me in a comment on Experiments in Time Series Clustering to this paper. Clustering of Time Series Subsequences is Meaningless: Implications for Previous and...
This week a new session of Data Analysis and Statistical Inference, taught by Doctor Mine Çetinkaya-Rundel from Duke university, has started on Coursera. Just like with the previous runs,...
by Joseph Rickert R user group activity is still on the rise. The following plot of the number of R user group meetings listed on Revolution Analytics' Community Calendar...
Mango Solutions releases version 1.0 of RapidNCA Chippenham, Wiltshire, UK – 5th March 2015 – Mango Solutions are pleased to announce the release of version 1.0 of RapidNCA, an...
We will start off this first section of Part 3 with a brief introduction of the plotting system ggplot2. Then, with the attention focused mainly on the syntax, we...
Given all the attention the internet has given to the colors of this dress, I thought it would be interesting to look at the capabilities for extracting colors in...
I’m pleased to announced that the new haven package is now available on CRAN. Haven makes it easy to read data from SAS, SPSS and Stata. Haven has the...
What is DataFest? DataFest is a team competition, where a team of up to 5...
Data Science has its own language. So, if you want to have at least a slight chance of surviving in the enterprise world of tomorrow -with its obsessive focus...
A modular Rmarkdown workbook in action I’m now using a properly modular Rmarkdown workbook, and really quite chuffed with it! I’ve seen discussion of electronic...
By Richard Pugh – Commercial Director, (UK). As the importance of using analytics to drive decision making continues to grow at pace, so too does the need to make...
The paper Analysis of the Linux Kernel Evolution Using Code Clone Coverage analysed 136 versions of Linux (from 1.0 to 2.6.18.3) and calculated the amount of source code that...
Another popular technique for classification (or at least, which used to be popular) is the (linear) discriminant analysis, introduced by Ronald Fisher in 1936. Consider the same dataset as...
JASP is an interesting project. It is based on R with additional facilities and functions such as automatic table generation. There appears to be an R package that provide...
In the February 2015 edition of The Journal of Finance, a well known academic paper, “The Pre-FOMC Announcement Drift”, was finally published, almost 4 years after the working paper...
In my simulation classes, we talk about how to generate random numbers. One of the techniques we talk about is the Linear Congruential Generator (LCG). Starting with a seed,...
by Matt Sundquist co-founder of Plotly Domino's new R Notebook and Plotly's R API let you code, make interactive R and ggplot2 graphs, and collaborate entirely online. Here is...
The R Project has once again been selected as a mentoring organization for this year's Google Summer of Code (GSoC). If you're not familiar with...
A Sharp Sight Labs reader (and now student), Jason P. recently started learning data science. He has a background in data analysis (primarily with Excel and related tools in...
The next Cologne R user group meeting is scheduled for this Friday, 6 March 2014 and we have an exciting agenda with two talks, followed...
We will start, in our Data Science course, to discuss classification techniques (in the context of supervised models). Consider the following case, with 10 points, and two classes (red...
Plotly: collaborative, publication-quality graphing.
