Tweetanalytics – Interactively analyzing tweets from accounts of 5 universities

June 1, 2013
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Tweetanalytics – Interactively analyzing tweets from accounts of 5 universities

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/1nzKbdq .  PLEASE UPDATE ANY BOOKMARKS YOU MAY HAVE.This is an attempt at learning an...

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Flotsam 12: early June linkathon

June 1, 2013
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A list of interesting R/Stats quickies to keep the mind distracted: A long draft Advanced Data Analysis from an Elementary Point of View by Cosma Shalizi, in which he uses R to drive home the message. Not your average elementary point of view. Good notes by Frank Davenport on starting using R with data from […]

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Regression regularization example

May 31, 2013
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Regression regularization example

Recently I needed a simple example showing when application of regularization in regression is worthwhile. Here is the code I came up with (along with basic application of parallelization of code execution). Assume you have 60 observations and 50 expla...

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How to fix the tabloids? Toward replicable social science research

May 31, 2013
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How to fix the tabloids?  Toward replicable social science research

This seems to be the topic of the week. Yesterday I posted on the sister blog some further thoughts on those “Psychological Science” papers on menstrual cycles, biceps size, and political attitudes, tied to a horrible press release from the journal Psychological Science hyping the biceps and politics study. Then I was pointed to these [...]The post How to fix the tabloids? Toward replicable social science research appeared first on…

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accurate ABC: comments by Oliver Ratman [guest post]

May 31, 2013
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accurate ABC: comments by Oliver Ratman [guest post]

Here are comments by Olli following my post: I think we found a general means to obtain accurate ABC in the sense of matching the posterior mean or MAP exactly, and then minimising the KL distance between the true posterior and its ABC approximation subject to this condition. The construction works on an auxiliary probability […]

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Belly Button Biodiversity: The End Game

May 30, 2013
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Belly Button Biodiversity: The End Game

In the previous installment of this saga, I admitted that my predictions had completely failed, and I outlined the debugging process I began.  Then the semester happened, so I didn't get to work on it again until last week.It turns out that there ...

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PLATO, an Alternative to PLINK

May 30, 2013
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PLATO, an Alternative to PLINK

Since the near beginning of genome-wide association studies, the PLINK software package (developed by Shaun Purcell’s group at the Broad Institute and MGH) has been the standard for manipulating the large-scale data produced by these studies.  O...

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There are no outliers

May 30, 2013
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Matt Brigg’s comment on outliers in his post Tyranny of the mean: Coontz used the word “outliers”. There are no such things. There can be mismeasured data, i.e. incorrect data, say when you tried to measure air temperature but your thermometer fell into boiling water. Or there can be errors in recording the data; transposition […]

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Infill asymptotics and sprawl asymptotics

May 30, 2013
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Infill asymptotics and sprawl asymptotics

Anirban Bhattacharya, Debdeep Pati, Natesh Pillai, and David Dunson write: Penalized regression methods, such as L1 regularization, are routinely used in high-dimensional applications, and there is a rich literature on optimality properties under sparsity assumptions. In the Bayesian paradigm, sparsity is routinely induced through two-component mixture priors having a probability mass at zero, but such [...]The post Infill asymptotics and sprawl asymptotics appeared first on Statistical Modeling, Causal Inference, and…

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Chance to ask me a question this Friday

May 30, 2013
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I will be at Book Expo this Friday signing books at the McGraw-Hill booth. If you're in NYC, drop by and say hi between 11 and 12. Yes, it's a new book! The title is Numbersense: How to Use Big...

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Chance to ask me a question this Friday

May 30, 2013
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I will be at Book Expo this Friday signing books at the McGraw-Hill booth. If you're in NYC, drop by and say hi between 11 and 12. Yes, it's a new book! The title is Numbersense: How to Use Big Data to Your Advantage (link). If you read my blogs, you already know where I'm going with this. How can we be smart consumers of data analyses in a world…

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Using simulation to estimate the power of a statistical test

May 30, 2013
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Using simulation to estimate the power of a statistical test

The power of a statistical test measures the test's ability to detect a specific alternate hypothesis. For example, educational researchers might want to compare the mean scores of boys and girls on a standardized test. They plan to use the well-known two-sample t test. The null hypothesis is that the [...]

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K. Staley: review of Error & Inference

May 30, 2013
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K. Staley: review of Error & Inference

K. W. Staley Associate Professor Department of Philosophy, Saint Louis University (Almost) All about error BOOK REVIEW Metascience (2012) 21:709–713 DOI 10.1007/s11016-011-9618-1 Deborah G. Mayo and Aris Spanos (eds): Error and inference: Recent exchanges on experimental reasoning, reliability, objectivity, and rationality. New York: Cambridge University Press, 2010, xvii+419 pp The ERROR’06 (experimental reasoning, reliability, objectivity, […]

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What statistics should do about big data: problem forward not solution backward

May 29, 2013
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There has been a lot of discussion among statisticians about big data and what statistics should do to get involved. Recently Steve M. and Larry W. took up the same issue on their blog. I have been thinking about this … Continue reading →

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Another one of those “Psychological Science” papers (this time on biceps size and political attitudes among college students)

May 29, 2013
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Paul Alper writes: Unless I missed it, you haven’t commented on the recent article of Michael Bang Peterson [with Daniel Sznycer, Aaron Sell, Leda Cosmides, and John Tooby]. It seems to have been reviewed extensively in the lay press. A typical example is here. This review begins with “If you are physically strong, social science [...]The post Another one of those “Psychological Science” papers (this time on biceps size and…

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SAS Dominates Analytics Job Market; R up 42%

May 29, 2013
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SAS Dominates Analytics Job Market; R up 42%

I’m continuing to gather and analyze data to update The Popularity of Data Analysis Software. In this installment I cover the latest employment figures. Employment is important to us all, so what software skills are employers seeking? A thorough answer … Continue reading →

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The 3D Trajectories of the Tennis Ball during the Final ATP Matches

May 29, 2013
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The 3D Trajectories of the Tennis Ball during the Final ATP Matches

Corona Perspectives [coronaperspectives.com] developed by advertising agency JWT Spain and web development studio Espada y Santa Cruz provides an interactive and 3D perspective of all the tennis ball trajectories during 3 past ATP tennis matches. The...

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Will Mu Go Out With Median

May 29, 2013
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Will Mu Go Out With Median

True story (no really, this did actually happen).  While in grad school one of the other teaching assistants was approached by one of the students and was asked “will mu go out with median?”  The teaching assistant thought the play on words was pretty funny, laughed, and then cluelessly walked away.  All of us other grad students […]

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Why doesn’t R have a MaxDiff package?

May 28, 2013
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Almost once every year someone asks if R has a package for running the MaxDiff procedure sold by Sawtooth.  One such inquiry recently received a reply with a link showing in some detail the R code needed to generate a balanced incomplete...

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Escalatingly uncomfortable

May 28, 2013
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Aggressive, fizzing nonconformity. The post Escalatingly uncomfortable appeared first on Statistical Modeling, Causal Inference, and Social Science.

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Nostalgia

May 28, 2013
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Saw Argo the other day, was impressed by the way it was filmed in such a 70s style, sorta like that movie The Limey or an episode of the Rockford Files. I also felt nostalgia for that relatively nonviolent era. All those hostages and nobody was killed. It’s a good thing the Ayatollah didn’t have [...]The post Nostalgia appeared first on Statistical Modeling, Causal Inference, and Social Science.

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Beatquake: the Music Listening Activity across Facebook over 90 days

May 28, 2013
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Beatquake: the Music Listening Activity across Facebook over 90 days

Mapping Music on Facebook [facebookstories.com] by Stamen Design for Facebook shows the dynamic characteristics of the typical listening activity across Facebook. Inspired by the dynamic movement of a graphic equalizer, Beatquake maps the popularity ...

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Every One, Every Day: Media Architecture Cube Reflects Energy Usage

May 28, 2013
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Every One, Every Day: Media Architecture Cube Reflects Energy Usage

Every One, Every Day [kuuki.com.au], designed by media production collective Kuuki, is a media architecture installation measuring 27 cubic meters that reflects the near real-time price and demand of energy in New South Wales, Australia. The cube wa...

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