Evidence-based Data Analysis: Treading a New Path for Reproducible Research (Part 2)

August 28, 2013
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Evidence-based Data Analysis: Treading a New Path for Reproducible Research (Part 2)

Last week I posted about how I thought the notion of reproducible research did not go far enough to address the question of whether you could trust that a given data analysis was conducted appropriately. From some of the discussion … Continue reading →

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Why during the 1950-1960′s did Jerry Cornfield become a Bayesian?

August 28, 2013
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Joel Greenhouse writes: I saw your recent paper on Feller [see here and, for a more fanciful theory, here]. Looks like it was fun to write. I recently wrote a paper that asks an orthogonal question to yours. Why during the 1950-1960′s did Jerry Cornfield become a Bayesian? It appeared in Statistics in Medicine – […]The post Why during the 1950-1960′s did Jerry Cornfield become a Bayesian? appeared first on…

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These journal editors probably forgot to drink their morning coffee

August 28, 2013
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These journal editors probably forgot to drink their morning coffee

Here we go again. Another useless study published in a peer-reviewed journal (Mayo Clinic Proceedings) with a relatively high impact factor and promoted as "Breaking News from the Editor" to the press who then attached a sensational headline and reported it as "science". This is what caught my eye: "Drinking more than 28 cups of coffee a week may be harmful for people younger than 55, according to a study."…

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C/C++: Median

August 28, 2013
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C/C++: Median

Output:C Codes: C++ Codes:

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Highlight the right elements of a chart

August 28, 2013
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Highlight the right elements of a chart

The big news in the tech world is Steve Ballmer's retirement accouncement. Andrew Sullivan cites this chart by Derek Thompson as a reason for Ballmer's departure: (original article) How about this version? What makes this version better? Having the Microsoft/Wintel...

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Bayesian Estimation of Correlation – Now Robust!

August 28, 2013
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Bayesian Estimation of Correlation – Now Robust!

So in the last post I showed how to run the Bayesian counterpart of Pearson’s correlation test by estimating the parameters of a bivariate normal distribution. A problem with assuming normality is that the normal distribution isn’t robust against...

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Using finite differences to estimate the maximum of a time series

August 28, 2013
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Using finite differences to estimate the maximum of a time series

Finding the maximum value of a function is an important task in statistics. There are three approaches to finding a maxima: When the function is available as an analytic expression, you can use an optimization algorithm to find the maxima. For example, in the SAS/IML language, you can use any [...]

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The desertification of the NHS

August 28, 2013
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The desertification of the NHS

The peerless Daily Mail reports today with its usual sobriety that "thousands are dying of thirst on NHS". The actual story is that NICE are about to release a new guideline on acute kidney injury (in Prince's spirit: the condition forme...

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Python: Download and Install Spyder in Ubuntu

August 28, 2013
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Python: Download and Install Spyder in Ubuntu

Python offers modules such as scipy, numpy, and pandas for data analysis. And I am going to use these as alternative to R. To get started, I recommend installing the Python IDE, Spyder. If you haven't yet installed python in your computer, don't worry ...

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Thoughts on Blogging

August 28, 2013
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I was recently asked some questions via email about blogging. Rather than respond via email, I’ve decided to do a Gelman and post my response here. The Biggest Challenge The first question was, What’s been your biggest blogging challenge (finding the time, picking good topics, the technology, etc.)? There is an obvious answer here and […]

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Visualizing the Forbes-CCAP University Rankings using ggplot2, rCharts, googleVis, and the shiny server

August 28, 2013
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Visualizing the Forbes-CCAP University Rankings using ggplot2, rCharts, googleVis, and the shiny server

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/1mcryNv. PLEASE UPDATE ANY BOOKMARKS YOU MAY HAVE. President Obama is pushing for higher education reform and...

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Interview with Ani Eloyan and Betsy Ogburn

August 27, 2013
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Jeff and I interview Ani Eloyan and Betsy Ogburn, two new Assistant Professors in the Department of Biostatistics here. Jeff and I talk to Ani and Betsy about their research interests and finally answer the burning question: "What is the … Continue reading →

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The Intellectual oubliette of p-values and Confidence Intervals.

August 27, 2013
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Criticizing P-values and Confidence Intervals (CI’s) is nothing new, but my aim is different. My goal is to tear down, shred, burn and destroy them using arguments you probably haven’t seen before, aided by Entropy and it’s various ma...

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Bayesian model averaging or fitting a larger model

August 27, 2013
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Nick Firoozye writes: I had a question about BMA [Bayesian model averaging] and model combinations in general, and direct it to you since they are a basic form of hierarchical model, albeit in the simplest of forms. I wanted to ask what the underlying assumptions are that could lead to BMA improving on a larger […]The post Bayesian model averaging or fitting a larger model appeared first on Statistical Modeling,…

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C/C++: Mean

August 27, 2013
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C/C++: Mean

Output: C Codes: C++ Codes:

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Hate the defaults

August 27, 2013
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Hate the defaults

One piece of advice I give for those wanting to get into data visualization is to trash the defaults (see the last part of this interview with me). Jon Schwabish, an economist with the government, gives a detailed example of...

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Round up of book news

August 27, 2013
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Here are links to coverage of Numbersense. David Walker and I debate whether statisticians should be a part of Big Data in Significance. (link - requires registration). Significance is a joint publication of the Royal Statistical Society and the American Statistical Association, and a great source of applied statistics. Walker fears Big Data is pure froth while I outline several problems in which statisticians can play a key role. Princeton…

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Creating Marginal Effect Plots for Linear Regression Models in R

August 27, 2013
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Creating Marginal Effect Plots for Linear Regression Models in R

I discuss how to use R to create marginal effect plots as a part of evaluating interactive theories as suggested by Brambor, Clark, and Golder (2006).

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googleVis 0.4.4 released with new formatting options for tables

August 27, 2013
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googleVis 0.4.4 released with new formatting options for tables

Over the weekend googleVis 0.4.4 found its way to CRAN. The function gvisTable gained a new argument formats that allow users to define the formats numbers displayed in tables. Thanks to J. Buros, who contributed the code.ExampleLoadingSession InfoR ve...

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De la disparition du français comme langue de référence (?)

August 27, 2013
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De la disparition du français comme langue de référence (?)

En mettant à jour ma chronique Somewhere Else, depuis quelques temps, j’avais l’impression de citer de moins en moins d’articles en français dans mes tweets. Plus j’y pensais, plus je me rendais compte que je lisais de moins en moins la presse française (ou disons en français). Quand je lis la presse en français, j’ai l’impression de retrouver, avec quelques jours de retard (quelques heures de retards pour les informations plus…

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MCMSki IV, Jan. 6-8, 2014, Chamonix (news #7)

August 26, 2013
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MCMSki IV, Jan. 6-8, 2014, Chamonix (news #7)

More exciting (and important!) news about MCMSki IV: First, some if not all of the 9 invited and the 16 contributed sessions are about now documented by abstracts. The program is completely set! If you plan to present a poster, remember to send me by email (a) surname, name (institution): title as the subject, (b) […]

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Latent Variable Mixture Modeling: When Heterogeneity Requires Both Categories and Dimensions

August 26, 2013
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Latent Variable Mixture Modeling:  When Heterogeneity Requires Both Categories and Dimensions

Dichotomies come easily to us, especially when they are caricatures as shown in this cartoon.  These personality types do seem real, and without much difficulty, we can anticipate how they might react in different situations.  For example, if...

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Statistics meme: Sad p-value bear

August 26, 2013
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Statistics meme: Sad p-value bear

I was just at a conference where the idea for a sad p-value bear meme came up (in the spirit of Biostatistics Ryan Gosling). This should not be considered an endorsement of p-values or p-value hacking.

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