A new idea for a science core course based entirely on computer simulation

April 21, 2016
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I happen to come across this post from 2011 that I like so much, I thought I’d say it again: Columbia College has for many years had a Core Curriculum, in which students read classics such as Plato (in translation) etc. A few years ago they created a Science core course. There was always some […] The post A new idea for a science core course based entirely on computer…

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Workshop on Infectious Disease Modelling in Public Health Policy: Current status and challenges (again)

April 21, 2016
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We've had a fantastic response to the workshop. In just a few days of public advertisement (I firstly posted about it and then advertised on allstat and HEALTHECON-ALL) we got 65 registration, as of today. We have provisionally set out 100 "t...

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Write papers like a modern scientist (use Overleaf or Google Docs + Paperpile)

April 21, 2016
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Write papers like a modern scientist (use Overleaf or Google Docs + Paperpile)

Editor’s note - This is a chapter from my book How to be a modern scientist where I talk about some of the tools and techniques that scientists have available to them now that they didn’t before. Writing - what should I do and why? Write using co...

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an integer programming riddle

April 20, 2016
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an integer programming riddle

A puzzle on The Riddler this week that ends up as a standard integer programming problem. Removing the little story around the question, it boils down to optimise 200a+100b+50c+25d under the constraints 400a+400b+150c+50d≤1000, b≤a, a≤1, c≤8, d≤4, and (a,b,c,d) all non-negative integers. My first attempt was a brute force R code since there are only […]

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Course Announcements: Statistical Network Models, Fall 2016

April 20, 2016
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Attention conservation notice: Self-promotion, and irrelevant unless you (1) will be a student at Carnegie Mellon in the fall, or (2) have a morbid curiosity about a field in which the realities of social life are first caricatured into an impoverishe...

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In memoriam Prita Shireen Kumarappa Shalizi

April 20, 2016
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4 September 1918 -- 4 April 2016

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“Cancer Research Is Broken”

April 20, 2016
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Michael Oakes pointed me to this excellent news article by Daniel Engber, subtitled, “There’s a replication crisis in biomedicine—and no one even knows how deep it runs.” Engber suggests that the replication problem in biomedical research is worse than the much-publicized replication problem in psychology. One reason, which I didn’t see Engber discussing, is financial […] The post “Cancer Research Is Broken” appeared first on Statistical Modeling, Causal Inference, and…

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Visualize missing data in SAS

April 20, 2016
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Visualize missing data in SAS

You can visualize missing data. It sounds like an oxymoron, but it is true. How can you draw graphs of something that is missing? In a previous article, I showed how you can use PROC MI in SAS/STAT software to create a table that shows patterns of missing data in […] The post Visualize missing data in SAS appeared first on The DO Loop.

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As a data analyst the best data repositories are the ones with the least features

April 20, 2016
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As a data analyst the best data repositories are the ones with the least features

Lately, for a range of projects I have been working on I have needed to obtain data from previous publications. There is a growing list of data repositories where data is made available. General purpose data sharing sites include: The open science ...

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Le Monde puzzle [#959]

April 19, 2016
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Le Monde puzzle [#959]

Another of those arithmetic Le Monde mathematical puzzle: Find an integer A such that A is the sum of the squares of its four smallest dividers (including1) and an integer B such that B is the sum of the third poser of its four smallest factors. Are there such integers for higher powers? This begs […]

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Notes from 2nd Bayesian Mixer Meetup

April 19, 2016
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Notes from 2nd Bayesian Mixer Meetup

Last Friday the 2nd Bayesian Mixer Meetup (@BayesianMixer) took place at Cass Business School, thanks to Pietro Millossovich and Andreas Tsanakas, who helped to organise the event.Bayesian Mixer at CassFirst up was Davide De March talking about the cha...

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R’s Growth Continues to Accelerate

April 19, 2016
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R’s Growth Continues to Accelerate

Each year I update the growth in R’s capability on The Popularity of Data Analysis Software. And each year, I think R’s incredible rate of growth will finally slow down. Below is a graph of the latest data, and as … Continue reading →

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Bayesian estimation of log-normal parameters – Update

April 19, 2016
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Bayesian estimation of log-normal parameters – Update

Using the log-normal density can be confusing because it's parameterized in terms of the mean and precision of the log-scale data, not the original-scale data. Thus, if your data, y, are nicely described by a log-normal distribution, the estimated m...

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“if you add a few more variables, you can do a better job at predictions”

April 19, 2016
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Ethan Bolker points me to this news article by Neil Irwin: Robert J. Gordon, an economist at Northwestern University, has his own version that he argues explains inflation levels throughout recent decades. But it is hardly simple. Its prediction for inflation relies not just on joblessness but also on measures of productivity growth, six shifts […] The post “if you add a few more variables, you can do a better…

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Three ethical viewpoints applied to the Clinton email scandal

April 19, 2016
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Last week, I gave an invited talk at the INFORMS Analytics Conference on ethics in data analytics. This is a follow-up to the HBR article from last year. In the talk, I discussed the need to have some frameworks to think about ethics. There are three main ethical philosophies that one can use to make ethical arguments. *** The Hillary Clinton email scandal is a good place to apply these…

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The Personified User Interface Trap

April 19, 2016
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The Personified User Interface Trap

Personified user interfaces, like chat bots or agents, are the new thing once again. But despite advances in artificial intelligence, they still have many issues and drawbacks compared to direct-manipulation interfaces. There was a debate around these interfaces in the 1990s, and it seems to be bound to repeat itself. In the last few weeks, Facebook unveiled a … Continue reading The Personified User Interface Trap

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DG XXXVII: Lumosity fined $2 million for deceiving customers about its “brain training” programs

April 18, 2016
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Paul Alper writes: Because you went to MIT and are a chess enthusiast, you probably know a lot more about Claude Shannon than I do. However, did you know that as intellectually brilliant as he was, he died of “after a long battle with Alzheimer’s disease”? I bring up this factoid because it sort of […] The post DG XXXVII: Lumosity fined $2 million for deceiving customers about its “brain…

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On deck this week

April 18, 2016
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Mon: DG XXXVII: Lumosity fined $2 million for deceiving customers about its “brain training” programs Tues: “if you add a few more variables, you can do a better job at predictions” Wed: Stochastic natural-gradient EP Thurs: A new idea for a science core course based entirely on computer simulation Fri: Oooh, it burns me up […] The post On deck this week appeared first on Statistical Modeling, Causal Inference, and…

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On the Real-Time GDP War

April 18, 2016
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A few days ago the WSJ did an interesting piece, Fed Banks Spar Over GDP Data, highlighting that the "race to provide credible real-time data on U.S. economic growth is pitting the Federal Reserve Bank of New York against its sibling in Atlanta."In all...

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Batmen not as interesting as it seems

April 18, 2016
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Batmen not as interesting as it seems

When this post appears, I will be on my way to Seattle. Maybe I will meet some of you there. You can still register here. I held onto this tip from a reader for a while. I think it came...

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Examine patterns of missing data in SAS

April 18, 2016
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Examine patterns of missing data in SAS

Missing data can be informative. Sometimes missing values in one variable are related to missing values in another variable. Other times missing values in one variable are independent of missing values in other variables. As part of the exploratory phase of data analysis, you should investigate whether there are patterns […] The post Examine patterns of missing data in SAS appeared first on The DO Loop.

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David MacKay

April 18, 2016
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David MacKay

I learned from this comment that David MacKay has passed away. Here’s an obituary, which has a lot of information, really much more than I could give because I only met MacKay a couple of times. The first time was when I was in Cambridge, England, for a conference, and I got there a day […] The post David MacKay appeared first on Statistical Modeling, Causal Inference, and Social Science.

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Improved vtreat documentation

April 17, 2016
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Improved vtreat documentation

Nina Zumel has donated some time to greatly improve the vtreat R package documentation (now available as pre-rendered HTML here). vtreat is an R data.frame processor/conditioner package that helps prepare real-world data for predictive modeling in a statistically sound manner. Even with modern machine learning techniques (random forests, support vector machines, neural nets, gradient boosted … Continue reading Improved vtreat documentation

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