Parallel resampling in the particle filter

May 12, 2014
By
Parallel resampling in the particle filter

Hey there, It’s been a while I haven’t written about parallelization and GPUs. With colleagues Lawrence Murray and Anthony Lee we have just arXived a new version of Parallel resampling in the particle filter. The setting is that, on modern computing architectures such as GPUs, thousands of operations can be performed in parallel (i.e. simultaneously) […]

Read more »

The index of an index is confusion

May 12, 2014
By
The index of an index is confusion

Through twitter, Antonio Rinaldi sent the following chart that accompanied a New York Times piece talking about the CPI (inflation index). The article concerns a very important topic--that many middle- to lower-income households have barely any saving after spending on...

Read more »

How to create a string of a specified length in SAS/IML

May 12, 2014
By
How to create a string of a specified length in SAS/IML

In my recent post on how to understand character vectors in SAS/IML, I left out an important topic: How can you allocate a character vector of a specified length? In this article, "length" means the maximum number of characters in an element, not the number of elements in a vector. […]

Read more »

The Wiener takes it all? A review of the 2014 Eurovision results

May 12, 2014
By
The Wiener takes it all? A review of the 2014 Eurovision results

Saturday's Eurovision Song Contest (ESC) from Copenhagen was hilarious as usual with acts from all over Europe and some more or less sensible gimmicks: a circular piano, a giant hamster wheel, a sea-saw, or indeed a beard and fancy dress. The results o...

Read more »

Handling @S3method’s Death in roxygen2 Version 4.0.0

May 12, 2014
By
Handling @S3method’s Death in roxygen2 Version 4.0.0

This is a quickie post and specific to package maintainers who use roxygen2. Legal Disclaimer: This worked for me but make sure there’s not a corner case that would make it not work for you.  In other words back your … Continue reading →

Read more »

“What should you talk about?”

May 11, 2014
By

Tyler Cowen quotes Robin Hanson: If your main reason for talking is to socialize, you’ll want to talk about whatever everyone else is talking about. Like say the missing Malaysia Airlines plane. But if instead your purpose is to gain and spread useful insight, so that we can all understand more about things that matter, […] The post “What should you talk about?” appeared first on Statistical Modeling, Causal Inference,…

Read more »

European MEP Data, Part 2

May 11, 2014
By
European MEP Data, Part 2

Following last week's short examination, I now wanted to drill down a bit more in the voting behaviour as given in data from votewatch.eu on voting of MEPs.Votewatch's Data describe how often MEPs voted what in the European Parliament. For each ME...

Read more »

Who ya gonna call for statistical Fraudbusting? R.A. Fisher, P-values, and error statistics (again)

May 11, 2014
By
Who ya gonna call for statistical Fraudbusting? R.A. Fisher, P-values, and error statistics (again)

If there’s somethin’ strange in your neighborhood. Who ya gonna call?(Fisherian Fraudbusters!)* *[adapted from R. Parker's "Ghostbusters"] When you need to warrant serious accusations of bad statistics, if not fraud, where do scientists turn? Answer: To the frequentist error statistical reasoning and to p-value scrutiny, first articulated by R.A. Fisher[i].The latest accusations of big time fraud in social […]

Read more »

Temporary Teaching Appointment(s)

May 10, 2014
By
Temporary Teaching Appointment(s)

My department is looking for one or more people to take up temporary teaching appointments in 2015.Fields of interest include corporate finance, macroeconomics, issues in European integration, money and banking, environmental economics, and labour...

Read more »

The weird state of statistics

May 10, 2014
By

Statistics a 100 years from now will look very different than it does today. That’s because it’s in a remarkably weird state currently, and this state won’t persist forever. Statisticians get used to the weirdness and forget just how ...

Read more »

What property is important in a risk prediction model? Discrimination or calibration?

May 10, 2014
By

Sanjay Kaul writes: I am sure you must be aware of the recent controversy ignited by the 2013 American College of Cardiology/American Heart Association Cholesterol Treatment Guidelines that were released last month. They have been the subject of several newspaper articles and blogs, most of them missing the thrust of the guidelines. There is much […] The post What property is important in a risk prediction model? Discrimination or calibration?…

Read more »

Priorities

May 10, 2014
By
Priorities

I like the way Channel 4 news prioritise their stories (that's their homepage as of 12.06PM $-$ below the one about Mrs President Obama, but above the one about Mr President Putin...

Read more »

Enrollments in US in Different Languages using rCharts and ggplot2

May 9, 2014
By

UPDATE: THE BLOG/SITE HAS MOVED TO GITHUB. THE NEW LINK FOR THE BLOG/SITE IS patilv.github.io and THE LINK TO THIS POST IS: http://bit.ly/1pi5z8l . PLEASE UPDATE ANY BOOKMARKS YOU MAY HAVE.

Read more »

Replication in Economics

May 9, 2014
By
Replication in Economics

I was pleased to receive an email today, alerting me to the "Replication in Economics" wiki at the University of Göttingen:"My name is Jan H. Höffler, I have been working on a replication project funded by the Institute for New Economic Thinking duri...

Read more »

Customer Satisfaction and Loyalty: Structural Equation Model or One-Dimensional Dissonance

May 9, 2014
By
Customer Satisfaction and Loyalty: Structural Equation Model or One-Dimensional Dissonance

Causal thinking is seductive. Product experience comes first, then feelings of satisfaction, and finally intentions to continue as a customer. Although customer satisfaction and loyalty data tend to be collected all at one time within the same question...

Read more »

More on the History of Econometrics

May 9, 2014
By
More on the History of Econometrics

Olav Bjerkholt, of the University of Oslo, emailed me to follow up on my May Reading List post. He commented:"I noted that you have posted a paper by me on your May list. I recently posted it as a SSRN paper with two others which also might i...

Read more »

Further points on crayon colors

May 9, 2014
By
Further points on crayon colors

I saw this great post on crayola crayon colors at the Learning R blog, reproducing a nice graph of the Crayola crayon colors over time. (Also see this even nicer version.) The Learning R post shows how to grab the crayon colors from the wikipedia page, “List of Crayola crayon colors,” directly in R. Here’s […]

Read more »

Nicholas Wade and the paradox of racism

May 9, 2014
By

The paradox of racism is that at any given moment, the racism of the day seems reasonable and very possibly true, but the racism of the past always seems so ridiculous. I’ve been thinking about this for a few months ever since receiving in the mail a new book, “A Troublesome Inheritance: Genes, Race, and […] The post Nicholas Wade and the paradox of racism appeared first on Statistical Modeling,…

Read more »

stopping rule impact

May 8, 2014
By
stopping rule impact

Here is a question from my friend Shravan Vasishth about the consequences of using a stopping rule: Psycholinguists and psychologists often adopt the following type of data-gathering procedure: The experimenter gathers n data points, then checks for significance (p<0.05 or not). If it’s not significant, he gets more data (n more data points). Since time […]

Read more »

UCL Biostats Network Symposium 3

May 8, 2014
By
UCL Biostats Network Symposium 3

We've finalised the line up for the next UCL Biostatistics Network Symposium on "Contemporary Statistical Methods in Medical Research".This year we'll have two sessions:1. Risk prediction models  in Health research $-$ Ian White, MRC Biostati...

Read more »

Two more points about crayon colors

May 8, 2014
By
Two more points about crayon colors

If you want to use crayon colors in R but you don’t want to rely on my R/broman package, you can just grab the code. Copy the relevant lines from the R/brocolors.R file: I spent a bit of time thinking about how best to sort the colors in a meaningful way, for the plot_crayons() function. […]

Read more »

Implementing PMFs in Python

May 8, 2014
By
Implementing PMFs in Python

Last year I gave a keynote talk at PyCon Taiwan called "Python Epistemology," and I wrote this blog article about it.  The video is here, but unfortunately the sound quality is poor.  In the talk, I demonstrate the use of a Counter, one ...

Read more »

Discussion with Steven Pinker on research that is attached to data that are so noisy as to be essentially uninformative

May 8, 2014
By

I pointed Steven Pinker to my post, How much time (if any) should we spend criticizing research that’s fraudulent, crappy, or just plain pointless?, and he responded: Clearly it *is* important to call out publicized research whose conclusions are likely to be false. The only danger is that it’s so easy and fun to criticize, […] The post Discussion with Steven Pinker on research that is attached to data that…

Read more »


Subscribe

Email:

  Subscribe