Posts Tagged ‘ Travel ’

implementing reproducible research [short book review]

July 14, 2014
By
implementing reproducible research [short book review]

As promised, I got back to this book, Implementing reproducible research (after the pigeons had their say). I looked at it this morning while monitoring my students taking their last-chance R exam (definitely last chance as my undergraduate R course is not reconoduced next year). The book is in fact an edited collection of papers […]

Read more »

ABC in Cancún

July 10, 2014
By
ABC in Cancún

Here are our slides for the ABC [very] short course Jean-Michel and I give at ISBA 2014 in Cancún next Monday (if your browser can manage Slideshare…) Although I may switch the pictures from Iceland to Mexico, on Sunday, there will be not much change on those slides we both have previously used in previous […]

Read more »

R/Rmetrics in Paris [alas!]

June 29, 2014
By
R/Rmetrics in Paris [alas!]

Today I gave a talk on Bayesian model choice in a fabulous 13th Century former monastery in the Latin Quarter of Paris… It is the Collège des Bernardins, close to Jussieu and Collège de France, unbelievably hidden to the point I was not aware of its existence despite having studied and worked in Jussieu since […]

Read more »

ABC model choice by random forests

June 24, 2014
By
ABC model choice by random forests

After more than a year of collaboration, meetings, simulations, delays, switches,  visits, more delays, more simulations, discussions, and a final marathon wrapping day last Friday, Jean-Michel Marin, Pierre Pudlo,  and I at last completed our latest collaboration on ABC, with the central arguments that (a) using random forests is a good tool for choosing the […]

Read more »

revenge of the pigeons

June 23, 2014
By
revenge of the pigeons

While I had not had kamikaze pigeons hitting my windows for quite a while…, it may be that one of them decided to move to biological warfare: when I came back from Edinburgh, my office at the University was in a terrible state as a bird had entered through a tiny window opening and wrecked […]

Read more »

A great visual of complicated schedules

June 16, 2014
By
A great visual of complicated schedules

Reader Joe D. tipped me about a nice visualization project by a pair of grad students at WPI (link). They displayed data about the Boston subway system (i.e. the T). The project has many components, one of which is the...

Read more »

checking for finite variance of importance samplers

June 10, 2014
By
checking for finite variance of importance samplers

Over a welcomed curry yesterday night in Edinburgh I read this 2008 paper by Koopman, Shephard and Creal, testing the assumptions behind importance sampling, which purpose is to check on-line for (in)finite variance in an importance sampler, based on the empirical distribution of the importance weights. To this goal, the authors use the upper tail  […]

Read more »

The pleasure of walking

June 3, 2014
By
The pleasure of walking

The proverb goes: walk before you run. My latest contribution to Harvard Business Review (link) makes the point that many websites can improve their user experience by focusing on simple personalization measures, like showing me my shirt size. Recommendation engines based on machine-learning algorithms still have ways to go. I ran across a number of obstacles in my recent travel, which again highlights the value of getting the basics down.…

Read more »

Navel-gazing at airfare data

May 7, 2014
By

It seems like Seth Kugel's article in the New York Times about "Crunching the Numbers to find the Best Airfare" is quite popular. In this article, he said things like this: The overall take on the best day to book tickets turns out to be somewhat underwhelming, if you look at the country as a whole. Hopper’s data shows it’s actually Thursday, but don’t expect that fact to save you…

Read more »

The Numbers Guy went on vacation

April 29, 2014
By
The Numbers Guy went on vacation

Carl Bialik used to be the Numbers Guy at Wall Street Journal - he's now with FiveThirtyEight. Apparently, he left a huge void. John Eppley sent me to this set of charts via Twitter. This chart about Citibike is very...

Read more »


Subscribe

Email:

  Subscribe