Posts Tagged ‘ R ’

an express riddle

January 19, 2017
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an express riddle

A quick puzzle on The Riddler this week that enjoys a quick solution once one writes it out. The core of the puzzle is about finding the average number of draws one need to empty a population of size T if each draw is uniform over the remaining number of individuals between one and the […]

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weakly informative reparameterisations for location-scale mixtures

January 18, 2017
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weakly informative reparameterisations for location-scale mixtures

We have been working towards a revision of our reparameterisation paper for quite a while now and too advantage of Kate Lee visiting Paris this fortnight to make a final round: we have now arXived (and submitted) the new version. The major change against the earlier version is the extension of the approach to a […]

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R from Excel

January 17, 2017
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When I first started getting into data analysis and statistics I didn’t really have a clue with what i was doing, but as then as now the default tool was Excel, must have been Excel 97. Now the spreadsheet model for data analysis isn’t the ...

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Beginners Exercise: Bayesian Computation with Stan and Farmer Jöns

January 14, 2017
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Beginners Exercise: Bayesian Computation with Stan and Farmer Jöns

Over the last two years I’ve occasionally been giving a very basic tutorial to Bayesian statistics using R and Stan. At the end of the tutorial I hand out an exercise for those that want to flex their newly acquired skills. I call this exercise Bay...

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RStudio Conference 2017 Recap

January 14, 2017
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RStudio Conference 2017 Recap

The first ever RStudio conference was held January 11-14, 2017 in Orlando, FL. For anyone else like me who spends hours each working day staring into an RStudio session, the conference was truly excellent. The speaker lineup was diverse and covered lot...

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New year resolution

January 13, 2017
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New year resolution

Now that the Christmas break is just a distant memory (Marta would say that I am quite happy with that $-$ she thinks I'm like the Grinch around the Christmas holiday. And she is right), I've given way to my new year's resolution of finally, prope...

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Trading Models and Distributed Lags

January 9, 2017
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Trading Models and Distributed Lags

Yesterday, I received an email from Robert Hillman.Robert wrote:"I’ve thoroughly enjoyed your recent posts and associated links on distributed lags. I’d like to throw in a slightly different perspective. To give you some brief background on my...

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Explaining the Almon Distributed Lag Model

January 6, 2017
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Explaining the Almon Distributed Lag Model

In an earlier post I discussed Shirley Almon's contribution to the estimation of Distributed Lag (DL) models, with her seminal paper in 1965.That post drew quite a number of email requests for more information about the Almon estimator, and how it fits...

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Why do Decision Trees Work?

January 6, 2017
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Why do Decision Trees Work?

In this article we will discuss the machine learning method called “decision trees”, moving quickly over the usual “how decision trees work” and spending time on “why decision trees work.” We will write from a computational learning theory perspective, and hope this helps make both decision trees and computational learning theory more comprehensible. The goal … Continue reading Why do Decision Trees Work?

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truncated normal algorithms

January 3, 2017
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truncated normal algorithms

Nicolas Chopin (CREST) just posted an entry on Statisfaction about the comparison of truncated Normal algorithms run by Alan Rogers, from the University of Utah. Nicolas wrote a paper in Statistics and Computing about a simulation method, which proposes a Ziggurat type of algorithm for this purpose, and which I do not remember reading, thanks […]

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