On the future of personalized medicine

April 24, 2012
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Jeff Leek, Reeves Anderson, and I recently wrote a correspondence to Nature (subscription req.) regarding the Supreme Court decision in Mayo v. Prometheus and the recent Institute of Medicine report related to the Duke Clinical Trials Saga.  The bas...

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Update

April 24, 2012
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I never got round to doing a post last week as I’ve been sidetracked by a plethora of free courses being offered. The Stanford professors that ran the AI course I did last year are now offering courses through udacity.com. … Continue readin...

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References to Object, Functional and Structured Data

April 24, 2012
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References to Object, Functional and Structured Data

M. A. Álvarez, L. Rosasco and N. D. Lawrence, Kernels for vector-valued functions: a review,  tech report, 2011. A. Argyriou, M. Pontil, and C.A. Micchelli, When is there a representer theorem? Vector versus matrix regularizers, Journal of Machine Learning Research, 10:2507-2529, 2009. G. Bakir, T. Hofmann, B. Schölkopf, A. Smola, B. Taskar and S. Vishwanathan (Eds.), Predicting Structured Data, MIT [...]

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line-by-line memory usage of a Python program

April 24, 2012
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My newest project is a Python library for monitoring memory consumption of arbitrary process, and one of its most useful features is the line-by-line analysis of memory usage for Python code. I wrote a basic prototype six months ago after being surpris...

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Q-A Section 9–Information Geometry and Statistics

April 24, 2012
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Q-A Section 9–Information Geometry and Statistics

Information Geometry is applying differential geometry to families of probability distributions, and so to statistical models. Information does however play two roles in it: Kullback-Leibler information, or relative entropy, features as a measure of divergence (not quite a metric, because it’s asymmetric), and Fisher information takes the role of curvature. One very nice thing about [...]

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Simple Moving Average Strategy with a Volatility Filter: Follow-Up Part 1

April 24, 2012
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Simple Moving Average Strategy with a Volatility Filter: Follow-Up Part 1

Analyzing transactions in quantstrat This post will be part 1 of a follow up to the original post, Simple Moving Average Strategy with a Volatility Filter. In this follow up, I will take a closer look at the individual trades of each strategy. This may provide valuable information to explain the difference in performance of the SMA … Continue reading →

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Example 9.28: creating datasets from tables

April 23, 2012
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Example 9.28: creating datasets from tables

RThere are often times when it is useful to create an individual level dataset from aggregated data (such as a table). While this can be done using the expand.table() function within the epitools package, it is also straightforward to do directly with...

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Coursera (and other online classes)

April 23, 2012
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Coursera (and other online classes)

A revolution is taking place in education. Last fall, Stanford University premiered three online classes in Artificial Intelligence, Machine Learning, and Introduction to Databases. I took Machine Learning and Intro to Databases, and this spring I’m ...

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Please Vote on the "Top Confusing Stats Terms"

April 23, 2012
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Please tell me what stats terms you think are the most confusing! Please order the terms you choose, according to how confusing they are (with #1 being most confusing). The results will dictate what topics are covered in future blogs! Blog entries for Confusing Stats Terms #10, #9, and #8 are already posted, so I'm only asking for terms #7 through #1. Thanks for your input! http://www.statsmakemecry.com/confusing-stats-terms/

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Please Vote on the "Top Confusing Stats Terms"

April 23, 2012
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Please tell me what stats terms you think are the most confusing! Please order the terms you choose, according to how confusing they are (with #1 being most confusing). The results will dictate what topics are covered in future blogs!Blog entries for Confusing Stats Terms #10, #9, and #8 are already posted, so I'm only asking for terms #7 through #1. Thanks for your input!http://www.statsmakemecry.com/confusing-stats-terms/Related Content:Top Ten Confusing Stats Terms…

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The Explanatory Power of Data Points

April 23, 2012
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The Explanatory Power of Data Points

As newspaper graphics go, scatterplots are a fairly advanced technique. They tend to show a reasonably large amount of data as single points, and they require the reader to have an idea what to look for. Most newspapers never bother using scatterplots for that reason, which is really too bad. With some explanation, a scatterplot can be a very effective means of displaying data, and in particular to allow the…

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Intraday Backtest

April 23, 2012
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Intraday Backtest

I came across a free source of Intraday Forex data while reading Forex Trading with R : Part 1 post. You can download either Daily or Hourly historical Forex data from the FXHISTORICALDATA.COM. The outline of this post: Download and Import Forex data Reference and Plot Intraday data Daily Backtest Intraday Backtest First,I created a [...]

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Stop faking it! Data should be real.

April 23, 2012
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Stop faking it! Data should be real.

Use real data when teaching statistics In statistical analysis the context of the data is integral, not a story added on afterwards to make it more interesting. It is not like algebra where “making it real” means  you make up … Continue reading →

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Sunday data/statistics link roundup (4/22)

April 22, 2012
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Now we know who is to blame for the pie chart. I had no idea it had been around, straining our ability to compare relative areas, since 1801. However, the same guy (William Playfair) apparently also invented the bar chart. So he wouldn’t be total...

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“And now something completely different…”

April 22, 2012
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“And now something completely different…”

Dropbox is an efficient way to synchronize folders between various computers (Windows, Linux, Mac…). It is free up to 2Go. I use it. If you want to try and use the following link, we both get an extra 0.5Go free…

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The Earth Institute needs a graphics advisor

April 22, 2012
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The Earth Institute needs a graphics advisor

Reader Dave S. was disturbed by the graphics in the inaugural World Happiness Report, published by Jeffrey Sachs's Earth Institute (link). It's a 200-page document with lots of graphs, many of which require rework. Here's a pie chart showing (purportedly)...

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Microsoft’s Windows Phone 8 Problem – A Solution

April 22, 2012
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Microsoft’s Windows Phone 8 Problem – A Solution

Briefly - there is plenty of chatter (see track // microsoft) about the possibility that Microsoft won't be upgrading existing handsets to Windows Phone 8. However, Hal makes a very interesting point in his post on the topic. The problem...

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A Statistician among the 100 Most Influential People in the World. Who is it?

April 22, 2012
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A Statistician among the 100 Most Influential People in the World. Who is it?

Congratulations to You Hans! Das ist mehr als verdient für die gewaltige Leistung, mit Statistiken das Bewusstsein für die grossen Probleme zu schaffen und zur Veränderung der Welt beizutragen. And here is his shortest talk – with his Stone ...

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IT tools for statistics, visualization, open data

April 22, 2012
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IT tools for statistics, visualization, open data

IT tools for statistics, visualization, open data IT tools for statistics, visualization, open data 29 viewsSeminar "Opening Financial Data in Turkey: transparency, accessibility and citizen involvement" "IT tools for statistics, visualization, o...

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Fancy HTML5 Slides with knitr and pandoc

April 22, 2012
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Fancy HTML5 Slides with knitr and pandoc

Karthik Ram gave an Introduction to R a couple of weeks ago, and I strongly recommend you to take a look at his cool HTML5 slides. I started trying HTML5 slides last year, and now it is difficult for me to go back to beamer, which I have used for a few...

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Fancy HTML5 Slides with knitr and pandoc

Fancy HTML5 Slides with knitr and pandoc

Karthik Ram gave an Introduction to R a couple of weeks ago, and I strongly recommend you to take a look at his cool HTML5 slides. I started trying HTML5 slides last year, and now it is difficult for me to go back to beamer, which I have used for a few years for my presenations. It is horrible to see beamer slides everywhere at academic conferences (especially the classic…

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Fog warning system: part two

April 20, 2012
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Fog warning system: part two

Background: I am trying to evaluate the effect on traffic safety of a fog warning system deployed in California in November 1996.  The system was installed by CalTrans on a section of I-5 and SR-120 near Stockton where the accident rate is ge...

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