an ABC experiment

November 23, 2014
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an ABC experiment

  In a cross-validated forum exchange, I used the code below to illustrate the working of an ABC algorithm: Hence I used the median and the mad as my summary statistics. And the outcome is rather surprising, for two reasons: the first one is that the posterior on the mean μ is much wider than

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Interpreting regression coefficient in R

November 23, 2014
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Interpreting regression coefficient in R

Linear models are a very simple statistical techniques and is often (if not always) a useful start for more complex analysis. It is however not so straightforward to understand...

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Slides of keynote speeches, tutorials and panelist presentations at IEEE Big Data 2014

November 23, 2014
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Slides of keynote speeches, tutorials and panelist presentations at IEEE Big Data 2014

Slides of keynote speeches, tutorials and panelist presentations at the 2014 IEEE International Conference on Big Data can be found at the conference website at links below. (1) Keynote...

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Calculates population growth rate λ along element changes

November 23, 2014
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Calculates population growth rate λ along element changes

The previous article introduced the sensitivity and elasticity to seasonal matrix model of imaginary annual plant.  Both sensitivity and elasticity are partial derivatives.  This means the values can only...

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When should I change to snow tires in Netherlands

November 23, 2014
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When should I change to snow tires in Netherlands

The Royal Netherlands Meteorological Institute has weather information by day for a number of Dutch stations. In this post I want to use those data for a practical problem:...

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proper use of GOSemSim

November 22, 2014
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proper use of GOSemSim

One day, I am looking for R packages that can analyze PPI and after searching, I found the ppiPre package in CRAN. The function of this package is not...

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Simulating scientists doing experiments

November 22, 2014
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Following a discussion on Gelman's blog, I was playing around with simulating scientists looking for significant effects. Suppose each of 1000 scientists run 200 experiments in their lifetime, and...

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Flowers/Fractals

November 21, 2014
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Flowers/Fractals

Last week, I attended a "Flower Fest" where I had the opportunity to admire several of the most beautiful and awarded flowers, orchids, and decoration plants. Surprisingly, though, I...

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New package: curl. High performance http(s) streaming in R.

November 21, 2014
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New package: curl. High performance http(s) streaming in R.

A bit ago I blogged about new streaming features in jsonlite: library(jsonlite) diamonds2 <- stream_in(url("http://jeroenooms.github.io/data/diamonds.json")) In the same blog post it was also mentioned...

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Information Density and Custom Chart Designs

November 21, 2014
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Information Density and Custom Chart Designs

I’ve been doodling today with a some charts for the Wrangling F1 Data With R living book, trying to see how much information I can start trying to pack...

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Ford uses R for data-driven decision making

November 21, 2014
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Mike Cavaretta is Ford Motor Company’s Chief Data Scientist, and was tasked by the incoming CEO Alan Mulally to help change the culture so that "important decisions within the...

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Free Stanford online course on Statistical Learning (with R) starting on 19 Jan 2015

November 21, 2014
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Free Stanford online course on Statistical Learning (with R) starting on 19 Jan 2015

This is an introductory-level course in supervised learning, with a focus on regression and classification methods. The syllabus includes: linear and polynomial regression, logistic regression and linear discriminant analysis;...

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Visualization of probabilistic forecasts

November 21, 2014
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Visualization of probabilistic forecasts

This week my research group discussed Adrian Raftery’s recent paper on “Use and Communication of Probabilistic Forecasts” which provides a fascinating but brief survey of some of his work...

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Synchronization for R with the flock Package

November 20, 2014
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Have you tried synchronizing R processes? I did and it wasn’t straightforward. In fact, I ended up creating a new package – flock. One of the improvements I did...

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Tips & Tricks 5: Extracting Classifiers Using Substring

November 20, 2014
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Today's exercise in another easy one, and is inspired by a question from Ariel Marcy of University of Queensland.Exercise 5 - How to extract classifiers from names of specimens.Well-organised...

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An xpd-tion into R plot margins

November 20, 2014
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An xpd-tion into R plot margins

This is a guest post by Prasad Patil that answers the question: how to put a shape in the margin of an R plot? The help page for R's...

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Geomorph update 2.1.2 Now Available!

November 20, 2014
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Geomorph update 2.1.2 Now Available!

Geomorph users,We have uploaded version 2.1.2 to CRAN. The windows and mac binaries have been compiled and the tarball is available.Version 2.1.2 comes with some small changes and new features: New...

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RNA-seq Data Analysis Course Materials

November 20, 2014
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Last week I ran a one-day workshop on RNA-seq data analysis in the UVA Health Sciences Library. I set up an AWS public EC2 image with all the necessary...

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LA R meetup – January 21: RStudio’s Shiny with Joe Cheng

November 20, 2014
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At this meetup we’re fortunate to have RStudio’s lead developer Joe Cheng flying in from...

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Partying R Style with Sqor Sports, R on Azure, and data.table

November 20, 2014
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Partying R Style with Sqor Sports, R on Azure, and data.table

by Joseph Rickert We usually have a pretty good time at the monthly Bay Area useR Group (BARUG) meetings, but this month's meeting was a bit more of a...

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Stacking files made easy

November 20, 2014
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Every campaign cycle I usually do similar things, go to a repository, download a bounce of data, merge and store them to an existing RData file for posterior analysis....

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R Debugging GUI Improvements for Bio7

November 20, 2014
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20.11.2014 In my last post i presented the first version of a debugging GUI for R in Bio7 which is just a visual wrapper for the default R debugging...

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The three types of Reddit posts, and how they make it to the front page

November 19, 2014
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The three types of Reddit posts, and how they make it to the front page

Todd Schneider's blog post on solving the traveling salesman problem with R hit the front page of reddit.com. This is a big deal: front-page placement on the popular social...

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The ensurer package (validation inside pipes)

November 19, 2014
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The ensurer package (validation inside pipes)

Guest post by Stefan Holst Milton Bache on the ensurer package. If you use R in a production environment, you have most likely experienced that some circumstances change in ways that...

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Trading The Odds Volatility Risk Premium: Addressing Data Mining and Curve-Fitting

November 19, 2014
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Trading The Odds Volatility Risk Premium: Addressing Data Mining and Curve-Fitting

Several readers, upon seeing the risk and return ratio along with other statistics in the previous post stated that the … Continue reading →

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Rabbit: (another) introduction to R

November 19, 2014
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Dear R users, Quantide is proud to announce its second

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Count Your BLAS-ings

November 19, 2014
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Count Your BLAS-ings

One nice thing about open-source software is that users often have a lot of choices.  Such is the case with R, for instance the thousands of contributed packages available...

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Excel spreadsheets are hard to get right

November 18, 2014
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Excel spreadsheets are hard to get right

Any practicing data scientist is going to eventually have to work with a data stored in a Microsoft Excel spreadsheet. A lot of analysts use this format, so if...

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R / Finance 2015 Call for Papers

November 18, 2014
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Earlier today, Josh send the text below to the R-SIG-Finance list, and I updated the R/Finance website, including its Call for Papers page, accordingly. We are...

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