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Every year, hundreds of R programmers descend on a host city and spend three or four days sharing work, collaborating on projects and making new contacts - the useR! conference, this year held in Stanford, CA. useR! offers a wonderful opportunity to ... [Read more...]

Quadratic discriminant analysis for classification is a modification of linear discriminant analysis that does not assume equal covariance matrices amongst the groups . Similar to LDA for several groups, quadratic discriminant analysis of several groups classification seeks to find the group that maximizes the quadratic classification function and assign the... The ... [Read more...]

In many cases we require some data with certain characteristics to develop a model, perform research, to test an algorithm or simply to practice.Here I show an example of how to generate some synthetic data that can help you to generate your own.We will need the ggplot2 library ... [Read more...]

The dplyr package by Hadley Wickham is a very useful package that provides “A Grammar of Data Manipulation”. It aims to simplify common data manipulation tasks, and provides “verbs”, i.e. functions that correspond to the most common data manipulation tasks. Have fun playing with dplyr in the exercises below! ... [Read more...]

By Fang Zhou, Microsoft Data Scientist; Hong Ooi, Microsoft Senior Data Scientist; and Graham Williams, Microsoft Director of Data Science Education is a relatively late adopter of predictive analytics and machine learning as a management tool. A keen desire for improving educational outcomes for society is now leading universities and ... [Read more...]

Raccoon is a free web-book about Statistical Models with R. It's the collection of twenty years of notes, exercises and concepts working with statistics and R. This is the third section of the second chapter, about 1-way Anova. The post Raccoon | Ch 2.3 – 1-way Anova appeared first on Quantide - R ... [Read more...]

A new version of the Discrete-Event Simulator for R was released a few days ago on CRAN. The most interesting new feature is the implementation of the subsetting operators [ and [[ for trajectory objects. Basically, think about trajectories as lists of... [Read more...]

A few months ago we launched R Course Finder, an online directory that helps you to find the right R course quickly. With so many R courses available online, we thought it was a good idea to offer a tool that helps people to compare these courses, before they decide ... [Read more...]

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Previously in this series: The beta distribution Empirical Bayes estimation Credible intervals The Bayesian approach to false discovery rates Bayesian A/B testing Beta-binomial regression Understanding empirical Bayesian hierarchical modeling Mixture models and expectation-maximization The ebbr package We’re approaching the end of this series on empirical Bayesian methods, and ... [Read more...]

by Joseph Rickert Last month, 217 new packages were submitted to CRAN. By my count this was the highest monthly value recorded for the past nine years. Below, are brief descriptions of fifty-two of these new-for-December packages grouped into six categories: Data, Data Science, Financial Analysis, Statistics, Utilities and Visualizations. The ... [Read more...]

In case you missed them, here are some articles from December of particular interest to R users. Power BI now has a gallery of custom visualizations built with R. Chicago's Department of Public Health uses R to prioritize health inspections at restaurants. A beautiful map of Switzerland municipalities combined with ... [Read more...]

Last week, Josh sent the call for papers to the R-SIG-Finance list making everyone aware that we will have our nineth annual R/Finance conference in Chicago in May. Please see the call for paper (at the link, below, or at the website) and consider submitting a paper. We are ... [Read more...]

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