Gary King and Stuart Shieber on Open Access

March 31, 2013
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Harvard Professors Gary King and Stuart Shieber provide advice to graduate students about open access, dissertations, and journal publishing. They explain how freely available publications are essential to the scientific community, but also benefit your own career. King suggests a clever way of dealing with publisher copyright agreements to prevent locking up your work behind ...

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Checking for Normality with Quantile Ranges and the Standard Deviation

Checking for Normality with Quantile Ranges and the Standard Deviation

Introduction I was reading Michael Trosset’s “An Introduction to Statistical Inference and Its Applications with R”, and I learned a basic but interesting fact about the normal distribution’s interquartile range and standard deviation that I had not learned before.  This turns out to be a good way to check for normality in a data set.

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Easter

March 31, 2013
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Easter

This morning, there was an interesting post entitled “why does Easter move around so much?” online on http://economist.com/blogs/economist-explains/… In my time series classes, I keep saying that sometimes, series can exhibit seasonlity, but the seasonal effect can be quite irregular. It is the cas for river levels, where snowmelt can have a huge impact, and it is irregular. Similarly, chocolate sales...

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R function to retrieve pubmed citations from pmid number

March 30, 2013
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This is useful number if you have hundreds of PMIDs and need specific fields from the pubmed/medline citation.  

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Importing Data to R

March 30, 2013
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There are number of ways in importing data into R, and several formats are available,From Excel to R From SPSS to RFrom Stata to R, and more hereIn this post, I'm going to talk about importing common data format that we often encounter, such as Excel, ...

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RSAGA: Getting Started

March 30, 2013
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RSAGA provides access to geocomputation capabilities of SAGA GIS from within R environment. Having SAGA GIS installed is a (quite obvious) pre-requirement to use RSAGA. In Linux x64 sometimes additional preparations are needed. In Linux SAGA as we...

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More ordinal data display

March 30, 2013
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More ordinal data display

The past two weeks I made a post regarding analyzing ordinal data with R and JAGS. The calculations in the second part made me realize I could actually get top two box intervals out of R. This demonstrated here. For that I needed the inv...

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Entering Data to R

March 30, 2013
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To enter data into R, two common and easy to use R functions are utilized.The concatenate function, c; and,The data.frame function.The concatenate function, c, is use for combining data points into a single numeric R object. The usage of this function ...

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Download and Install R in Ubuntu

March 30, 2013
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Download and Install R in Ubuntu

There are two ways to install R in Ubuntu. One is through the terminal, and the other is through the Ubuntu Software Center.Through TerminalPress Ctrl+Alt+T to open Terminal Then execute sudo apt-get update After that, sudo apt-get install r-baseT...

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Download and Install R in Windows

March 30, 2013
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The R statistical package is available at CRAN website. In this site, do the followingClick the Download R for Windows. Then go to install R for the first time in the base subdirectory. And finally download the latest version of R for windows...

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Identify 2/3 vacation photos, win $5 Starbucks gift card

March 29, 2013
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Identify 2/3 vacation photos, win $5 Starbucks gift card

I have a $5 Starbucks gift card that I simply can't remember to use; I've had it since Christmas. So, I will mail it (within the U.S.A.) to the first commenter who can identify the longitude/latitude (within 5km) where two of these three vacation photos were taken (photos below). ***Update 3/30/2013: locations A and C

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R/Finance 2013 Registration Open

March 29, 2013
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The registration for R/Finance 2013 -- which will take place May 17 and 18 in Chicago -- is NOW OPEN!Building on the success of the previous conferences in 2009, 2010, 2011 and 2012, we expect more than 250 attendees from around the world. R users from...

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Facebook profile photo changes reveal trends in support for same-sex marriage

March 29, 2013
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Facebook profile photo changes reveal trends in support for same-sex marriage

On Tuesday and Wednesday this week, the US Supreme Court heard two landmark cases related to same-sex marriage rights in this country. Simultaneously, to show solidarity for the cause of civil rights for gay members of society, thousands of Facebook users changed their profile pictures to a red equality symbol at the suggestion of the Human Rights Campaign. Most...

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R on Android

March 29, 2013
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R on Android

In Riyadh I spent a rainy afternoon trying to work out how this was done (no, not really rainy but stayed indoors instead of driving about the desert). There's not much on the web about it. For at least a year people have been saying there will be an app - and yes, one will eventually appear, but for now...

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R / Finance 2013 Open for Registration

March 29, 2013
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The annoucement below just went to the R-SIG-Finance list. More information is as usual at the R / Finance page: Now open for registrations: R / Finance 2013: Applied Finance with R May 17 and 18, 2013 Chicago, IL, USA The registration for R/Fin...

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Julia builds for Ubuntu precise/quantal

March 29, 2013
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I wanted to play a bit Julia, the new language for technical computing, but no binaries were available yet for current versions of Ubuntu. So I decided to try and build them myself by backporting the julia 1.2.0 source package available in Sid and Raring. On Quantal, the packages were building out of the box. ...

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Open Data Exchange 2013, April 6. Montreal

March 29, 2013
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Open Data Exchange 2013, April 6. Montreal

UPDATE: The day was great! There are many people doing really amazing things with open data and it was amazing to meet them. Here are my slides from the panel talk. Next Saturday, I’ll be sitting on a panel discussing future avenues for open data at ODX13. From the odx13 site: Odx13 is a mini-conference

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latent Gaussian model workshop in Reykjavik

March 28, 2013
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latent Gaussian model workshop in Reykjavik

An announcement for an Icelandic meeting next September, meeting I would have loved to attend (darn!)… This meeting is sponsored by the BayesComp session, of course!!! We are pleased to announce that the University of Iceland will host the 3rd Workshop on Bayesian Inference for Latent Gaussian Models with Applications (LGM). The workshop will be

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The apply function in R

March 28, 2013
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So as discussed in this post I will be investigating the different members of the 'apply function family' in R. This post starts with the most basic one, called apply(). The R manual states the following apply(X, MARGIN, FUN, ...) With the following arguments X an array, including a matrix. MARGIN a vector giving the subscripts which

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Moving up in the ranks: from an R-Rookie to an R-Pro

March 28, 2013
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I am playing with R now for little over a year. Not very intensive, but once in a while I start up R Studio and do some coding and analysis. But I am still far, far away from becoming an R-Pro. If you talk to or read some of the posts of the more seaso...

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Swimming in a sea of code

March 28, 2013
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Swimming in a sea of code

If you are looking for code here, move on. > In the beginning, there was only the relentless blinking of the cursor. With the maddening regularity of waves splashing on the shore: blink, blink, blink, blink…Beyond the cursor, the white wasteland … Continue reading →

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Playing with earthquake data

March 28, 2013
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(This article was first published on Digithead's Lab Notebook, and kindly contributed to R-bloggers) To leave a comment for the author, please follow the link and comment on their blog: Digithead's Lab Notebook. R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: Data science, Big Data, R jobs, visualization (ggplot2, Boxplots, maps, animation), programming...

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Creating a Business Dashboard in R

March 28, 2013
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Creating a Business Dashboard in R

Business dashboards are available in many shapes and sizes. Business dashboards are useful to create an overview of key performance indicators (KPIs) important for the business strategy and/or operations. There are many flavours of dashboard frameworks and apps available, ranging in price from thousands of dollars to open-source implementations. Apparently  Read more »

Data visualization with R and ggplot2

March 28, 2013
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Data visualization with R and ggplot2

I’m working on a one-hour ggplot2 lecture for the San Diego R users group, which I will post here when I’m done. I think there are many great intro to R data visualization resources out there so I’ll only share working examples on my blog. A retail chain client employs a few hundred field agents who perform

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Generalized Pairs Plot: It’s about time!

March 28, 2013
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Generalized Pairs Plot: It’s about time!

JW Emerson, WA Green, B Schloerke, J Crowley, D Cook, H Hofmann, H Wickham (2013) The Generalized Pairs Plot. Journal of Computational and Graphical Statistics 22(1). Here's a free preprint version. Until this new paper and implementation by Emerson et al., there were no widely available pairs plots that accommodated both numerical and categorical fields.

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Benford law and lognormal distributions

March 28, 2013
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Benford law and lognormal distributions

Benford’s law is nowadays extremely popular (see e.g. http://en.wikipedia.org/…). It is usually claimed that, for a given set data set, changing units does not affect the distribution of the first digit. Thus, it should be related to scale invariant distributions. Heuristically, scale (or unit) invariance means that the density of the measure  (or probability function) should be proportional to...

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Lots of data != "Big Data"

March 28, 2013
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Lots of data != "Big Data"

by Joseph Rickert When talking with data scientists and analysts — who are working with large scale data analytics platforms such as Hadoop — about the best way to do some sophisticated modeling task it is not uncommon for someone to say, "We have all of the data. Why not just use it all?" This sort of comment often...

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Rencontres R, Lyon 27-28 June

March 28, 2013
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Rencontres R, Lyon 27-28 June

Last year, the first French-speaking R conference, “Rencontres R“  was held in Bordeaux.  The meeting was a great success, and a second one will be  held in Lyon on 27 and 28 June 2013. The abstract submission deadline of 7 … Continue reading →

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RForcecom – An R package provides the connection between R and Salesforce.com

March 28, 2013
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RForcecom – An R package provides the connection between R and Salesforce.com

In this post, I’ll introduce an R package RForcecom and its usage. As you may know, R statistical computing environment is the most populous statistical computing software, and Salesforce.com is the world’s most innovative cloud-computing based SaaS (Software-as-a-Service) CRM package.…Read more ›

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