For those of us interested in reproducible analysis, Rmarkdown is a great way of communicating our code to other researchers. Rstudio, in particular, makes it very easy to create attractive HTML document containing text, code, and figures, which can then be sent to colleagues or put on the internet for ... [Read more...]

... using the new R package sas7bdat.parso. The software company GGASoftware has extended the work of myself and others on the sas7bdat R package by developing a Java library called Parso, which also reads sas7bdat files. They have worked out most of the remaining kinks. For example, ... [Read more...]

I’m history! No, I’m mythology! Nah, I don’t care what I am; I’m free hee! (Genie, when he is released from the magical oil lamp by Aladdin) A long time ago, in a kingdom far away, lived a beautiful princess named Jasmine. There also lived a ... [Read more...]

Today I stumbled across a figure in an explanation on multiple factor analysis which contained pictograms.   Figure 1 from Abdi & Valentin (2007), p. 8. I wanted to reproduce a similar figure in R using pictograms and additionally color them e.g. by group membership . I have almost no knowledge about image processing, so […] [Read more...]

Enough with the theory we recently published, let's take a break and have fun on the application of Statistics used in Data Mining and Machine Learning, the k-Means Clustering.k-means clustering is a method of vector quantization, originally from signa... [Read more...]

We’re thrilled to announce the availability of shinyStore, an R package that enables HTML5 Web Storage from Shiny, an interactive web application framework for R. A live demo of an example application is available here. Set a text value then refresh the page, or close the tab and come ... [Read more...]

We’re thrilled to announce the availability of shinyStore, an R package that enables HTML5 Web Storage from Shiny, an interactive web application framework for R. A live demo of an example application is available here. Set a text value then refresh the page, or close the tab and come ... [Read more...]

TL;DR? We started an R Users group, awesome community, huge turnout at first meeting, lots of potential.---I've sat through many hours of meetings where faculty lament the fact that their trainees (and the faculty themselves!) are woefully ill-prepared... [Read more...]

Martin Maechler is a member of R-Core. This distinction puts him in the very apex... [Read more...]

What makes a good academic conference? Here's what we like. The post What makes a good academic conference? appeared first on Decision Science News. [Read more...]

Here in the Northern hemisphere, gardeners are gathering seeds from their prize-winning vegetables are storing them away for next year’s crop. Today at the 20th London Stata Users’ Group meeting, I learnt a similar trick. It’s strange I never thought … Continue reading → [Read more...]

A brown bag release 0.1.2 of pkgKitten is now on CRAN, following yesterday's 0.1.1 upload Next time I'll try to remember that when I have parameters name and path, it won't work so well to call them as path and name ... Changes in version 0.1.2 (20... [Read more...]

by Joseph Rickert The days are getting shorter here in California and the summer R conferences UseR!2014 and JSM are behind us, but there are still some very fine conferences for R users to look forward to before the year ends. DataWeek starts in San Francisco on September 15th. I ... [Read more...]

If Birmingham, UK has one, then Birmingham, AL, USA should too. There is a big gaping hole in R user groups between Georgia and Texas that I think needs filling.  Way back in 2011, I weakly posted R User Group Birmingham Alabama, but this time I am mo... [Read more...]

The following figure shows the probability distributions of vote intentions for the main candidates after distributing the stock of undecided voters. As Marina (PSB) is getting back to her track, a question that comes to light is whether Dilma will get more votes than the sum of the others, and ... [Read more...]

This post is a review of the “GENERALIZED DOUBLE PARETO SHRINKAGE” Statistica Sinica (2012) paper by Armagan, Dunson and Lee. Consider the regression model (Y=Xbeta+varepsilon) where we put a generalized double pareto distribution as the prior on the regression coefficients (beta). The GDP distribution has density $$begin{equation} f(... [Read more...]

In my prior post on visualizing website structure using network graphs, I referenced that network graphs showed the pairwise relationships between two pages (in a bi-directional manner). However, if you want to analyze how your visitors are pathing through your site, you can visualize your data using a Sankey chart. ... [Read more...]

A maintenance release 0.1.1 of pkgKitten is now on CRAN. It has only one small change: the function playWithPerPackageHelpPage() was factored out of the main function kitten() as I happened to be needing something just like playWithPerPackageHelpPage... [Read more...]

How can we measure the number of additional clicks or sales that an AdWords campaign generated? How can we estimate the impact of a new feature on app downloads? How do we compare the effectiveness of publicity across countries?In principle, all of these questions can be answered through causal ... [Read more...]

This post was inspired by some musings from John Bollinger that as data in the financial world wasn’t normally distributed, … Continue reading → [Read more...]