Filed under: R, Running Tagged: Argentan, background, half-marathon, Normandy, race, road races, running, splits [Read more...]

Get data that fit before you fit data. Why verify? Garbage in, garbage out. How to verify The example data used here is daily (adjusted) prices of stocks.  By some magic that I’m yet to fathom, market data can be wondrously wrong even without the benefit of the possibility ... [Read more...]

Presentations of the fifth Torino R net meeting are now available on line, section Downloads. Thank you to all who attended the meeting on Thursday 11th April and special thanks to presenters. … Continue reading → [Read more...]

the panel study of income dynamics (psid) is a one-trick pony.  better than anything else out there, this survey allows you to answer the question, "where are they now?"  after tracking the same nationally-representative cohort of americans (... [Read more...]

My office computer recently got a really nice upgrade and now I have 8 cores on my desktop to play with. I also at the same time received some code for a Gibbs sampler written in R from my adviser. I wanted to try a metropolis-coupled markov chain monte carlo, , algorithm ... [Read more...]

On 21 November 2013 – 14:00 there will be a free Sweave course and starting at 16:30 there will be the Sixth Torino R net meeting. Events will take place at Campus Luigi Einaudi, Università degli Studi di Torino. Please visit events‘ page for details and if … Continue reading → [Read more...]

welcome and presentation (download 0,1MB), Torino R net organisers; Winning with R (and friends) – How data analysts affect the standings in sports championships (download 0,7MB), Massimilano Marchi, Regione Emilia-Romagna; Predictive analytics to manage dispatchment of intermittent energy sources: R … Continue reading → [Read more...]

In order to check that an estimation algorithm is working properly, it is useful to see if the algorithm can recover the true parameter values in one or more simulated "test" data sets. This post explains how to build such … Continue reading → [Read more...]

As a part of Twitter Data Analysis, So far I have completed Movie review using R & Document Classification using R. Today we will be dealing with discovering topics in Tweets, i.e. to mine the tweets data to discover underlying topics– approach known as Topic Modeling.What is Topic Modeling?... [Read more...]

I am trying exercise 59.8 (page 5057) of the SAS/STAT Users Guide 12.3 in R. The interesting thing is that influence is investigated on subject level rather than individual level. The diagnostics in nlme does not do leave-subject-out, at least, not tha... [Read more...]

Recent crimes against women, specifically the 2012 gang rape in New Delhi of a 23 year old lady, have pushed this issue as a substantially significant one for Indians to deal with. In this post, I try to address 8 different questions regarding crime against women in India. (1). How have numbers in different ... [Read more...]

After a bit of a hiatus in public speaking, I will be presenting Functional Programming In The Computational Sciences With …Continue reading » [Read more...]

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Source is usually best explained by the source.  Ramnath Vaidyanathan provides an excellent look under the hood in his tutorial on rCharts explaining how he integrates the new d3 library uvCharts. If you want to explore further, here is a list of... [Read more...]

This post lists the sources and types of financial data that is accessible directly from R. I included here free and non free ressources. Obviously given the size and the activity of the R community this is work in constant progress. I might update thi... [Read more...]

In this post, we define the Two-Parameter Logistic (2PL) IRT model, derive the complete conditionals that will form the basis of the sampler, and discuss our choice of prior specification. We can find the appropriate values of numerically in R … Continue reading → [Read more...]

R is an interpreted programming language that makes it easy to think about statistics instead of thinking about programming. Unlike other programming languages, R is commonly used by typing commands one-at-a-time in an interactive session. RStudio is a program that … Continue reading → [Read more...]

I’ve been getting emails asking questions about my upcoming course on Forecasting using R. Here are some answers. Do I need to use the Revolution Enterprise version of R, or can I use open-source R? Open source R is fine. Revolution Analytics is organizing the course, but there is ... [Read more...]

If you’ve read any of my previous posts you know [...] [Read more...]