oro.nifti 0.2.1

October 9, 2010
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The R package oro.nifti contains functions for the input/output and visualization of medical imaging data that follow either the ANALYZE or NIfTI formats.  This package is part of the Rigorous Analytics bundle.The latest version of oro.nifti (0....

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oro.nifti 0.2.1

October 9, 2010
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The R package oro.nifti contains functions for the input/output and visualization of medical imaging data that follow either the ANALYZE or NIfTI formats.  This package is part of the Rigorous Analytics bundle.The latest version of oro.nifti (0....

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oro.dicom 0.2.7

October 9, 2010
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The R package oro.dicom contains functions for the input/output of medical imaging data that conform to the Digital Imaging and Communications in Medicine (DICOM) standard.  This package is part of the Rigorous Analytics bundle. The latest version...

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oro.dicom 0.2.7

October 9, 2010
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The R package oro.dicom contains functions for the input/output of medical imaging data that conform to the Digital Imaging and Communications in Medicine (DICOM) standard.  This package is part of the Rigorous Analytics bundle. The latest version...

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A competition to recommend “relevant” R packages – and the future of R

October 9, 2010
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Update: the competition was just launched. * * * What is the competition about? Drew Conway and John Myles Whyte have collected data from (52) R users about the packages they have installed. The data is now available on github for download and the contest will be run on the kaggle platform. For more details,

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Mapping BioStar users onto the world map

October 9, 2010
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Mapping BioStar users onto the world map

Neil is my new bioinformatics hero! (Sorry Pierre :)BioStar is a Q&A website for bioinformatics, just like the Blue Obelisk eXchange. Neil and Pierre have an ongoing struggle to gain the most karma, requiring Pierre to put in a formal complaint aga...

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BioStar users (of the world, unite)

October 9, 2010
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BioStar users (of the world, unite)

Egon writes: Can someone please plot the BioStar users on a Google Map? Sounds like a challenge. Let’s go. 1. Harvesting user IP addresses BioStar user profiles (here’s mine) include a location field. It’s free text and optional, which means that location is missing or inaccurate for many users. However, if you’re logged into BioStar

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Nightlights II

October 8, 2010
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Nightlights II

I’ve modified some routines so that we are always grabbing a roughly equal area regardless of the latitude. Basically, you do this: getLonScaleFactor <- function(lat){ kmAtEq <-111.3195 kmAtLat <- 111.41288*cos(lat*DEGREES.TO.RADIANS)-.09350*cos(3*lat*DEGREES.TO.RADIANS)+0.00012*cos(5*lat*DEGREES.TO.RADIANS) return(kmAtEq/kmAtLat) } # the above function returns a scale factor for km per degree @ a given latitude getExtent <-function(x,halfLength=.5,LonLat) { lonAdjust<-getLonScaleFactor(LonLat)*halfLength yMin <- max(ymin(x),LonLat

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Creating structured and flexible models: some open problems

October 8, 2010
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Prof. Andrew Gelman, from both the Statistics and Political Science departements at Columbia presented this talk to the New York R Statistical Programming Meetup on October 7, 2010. Description: A challenge in statistics is to construct models that ar...

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A competition to predict popular R packages

October 8, 2010
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A competition to predict popular R packages

What makes an R package popular? The number of people that use a given R package is a common point of discussion, but it turns out that it's kind of tricky to get hard and fast data to answer this question. You can look at the "I use this" number on crantastic.org, but that's a self-reported number (many more...

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Data mining competition with R

October 8, 2010
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There is a new data mining competition aimed at predicting preferred data mining tools in R via dataists.com.   The concept of the competition is to try to determine which R packages are preferred in the R community via their CRAN package librarie...

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Data mining competition with R

October 8, 2010
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There is a new data mining competition aimed at predicting preferred data mining tools in R via dataists.com.   The concept of the competition is to try to determine which R packages are preferred in the R community via their CRAN package librarie...

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Contest for developing an R package recommendation system

October 7, 2010
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After I spoke tonight at the NYC R meetup, John Myles White and Drew Conway told me about this competition they're administering for developing a recommendation system for R packages. They seem to have already done some work laying out... ...

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Nightlights

October 7, 2010
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Nightlights

Those who follow the discussions about UHI understand that “nightlights” plays a large role in defining whether or not a station is considered Rural or Urban. In the work of GISS nightlights are determined by looking at the DSMP product. The product is available in 30 arcsecond format. That’s .00833 degrees. The following issue arises.

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Pre-ordinary meeting

October 7, 2010
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Pre-ordinary meeting

Those are the slides for the (basic) introduction of the paper by Mark Girolami and Ben Calderhead at the RSS next week. Not to be confused with my comments on the paper. Filed under: R, Statistics, Travel, University life Tagged: Hamiltonian, Langevi...

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Students in predominantly ethnic minority classes want segregated education very much. The others don’t.

October 7, 2010
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Students in predominantly ethnic minority classes want segregated education very much. The others don’t.

I just did this for what will hopefully be a book chapter on our Divided Education – Divided Citizens research project with NEPC. Explanation further below for anyone more interested in the actual topic About the graphic: I like raw-data plots like this, made possible by Hadley Wickhams’s amazing ggplot2 package for the stats package

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Students in predominantly ethnic minority classes want segregated education very much. The others don’t.

October 7, 2010
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Students in predominantly ethnic minority classes want segregated education very much. The others don’t.

I just did this for what will hopefully be a book chapter on our Divided Education - Divided Citizens research project with NEPC. Explanation further below for anyone more interested in the actual topic ;-) About the graphic: I like raw-...

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Studying joint effects in a regression

October 7, 2010
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Studying joint effects in a regression

We've seen in the previous post (here)  how important the *-cartesian product to model joint effected in the regression. Consider the case of two explanatory variates, one continuous (, the age of the driver) and one qualitative (, gasoline ve...

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Build a Recommendation System for R Packages

October 7, 2010
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On Dataists, a new collaborative blog for data hackers that I’m contributing to, we’ve just announced a data contest that’s custom made for R users. To win the contest, you need to build a recommendation system for R packages. To find out more, check out the official announcement on Dataists. Then go to GitHub to

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Using Data Tools to Find Data Tools, the Yo Dawg of Data Hacking

October 7, 2010
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by John Myles White and Drew Conway Editors’ Note: One theme likely to recur on dataists.com is that data hackers love using their tools to analyze, visualize, and predict everything. Data hackers also love discovering and learning about new tools. So it should come as no surprise that Dataist contributors John Myles White and Drew

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R is Hot: Part 1

October 7, 2010
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This is Part 1 of a five-part article series, with new parts published each Thursday. You can download the complete article from the Revolution Analytics website. How Did a Statistical Programming Language Invented in New Zealand Become a Global Sensation? Much in the same way that social networking, reality TV and craft beer were considered marginal fads before gaining...

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LondonR Rcpp slides

October 7, 2010
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I'm just back to london where I presented about Rcpp at mango's LondonR event. This was the third time (after rmetrics and useR!) I presented these slides, so I allowed myself some new metaphores about my long term relationship with R and my ind...

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Science is vital – what we don’t know yet

October 6, 2010
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Science is vital – what we don’t know yet

This post is not about R (for a change). For working UK scientists, science is vital – sign the on-line petition to preserve science funding. For my contribution of what we don’t know yet - We don’t know whether we can use biomarkers of kidney injury to personalise the doses of medications to maximise the

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Creating GUIs in R with gWidgets

October 6, 2010
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Creating GUIs in R with gWidgets

The gWidgets framework is a way of creating graphical user interfaces in a toolkit independent way. That means that you can choose between tcl/tk, Gtk, Java or Qt underneath the bonnet. There's also a web-version based upon RApache and ExtJS. Since the code is the same in each case, you can change your mind and swap toolkits...

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R is Hot

October 6, 2010
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Our mission at Revolution Analytics is to make R the statistical analysis tool of choice in the workplace. But even though R is pervasive in academia and rising in popularity generally, we still sometimes get blank faces when we demonstrate R to potential new clients. Sure, most people have heard of R -- it's been hard to miss in...

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Belgian Astronomers and Exercise Machines

October 6, 2010
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Belgian Astronomers and Exercise Machines

In the twisting paths of human discovery, you never quite know what intellectual enterprise is going to result in a world changing discovery.  For instance, the mathematical notion of expected value did not grow up in a sterile, academic environment.   In 1654 Blaise Pascal was approached by Chevalier de Méré who was interested...

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Belgian Astronomers and Exercise Machines

October 6, 2010
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Belgian Astronomers and Exercise Machines

In the twisting paths of human discovery, you never quite know what intellectual enterprise is going to result in a world changing discovery.  For instance, the mathematical notion of expected value did not grow up in a sterile, academic environment.   In 1654 Blaise Pascal was approached by Chevalier de Méré who was interested...

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Convert decimal to IEEE-754 in R

October 6, 2010
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For some theory on the standard IEEE-754, you can read the Wikipedia page. Here I will post only the code of the function to make the conversion in R.First we write some functions to convert decimal numbers to binary numbers:decInt_to_8bit q r xx for(i in 1:precs){xx q r xx }rr return(rr)}devDec_to_8bit nas nbs xxs for(i in 1:precs){xxs...

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Convert decimal to IEEE-754 in R

October 6, 2010
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For some theory on the standard IEEE-754, you can read the Wikipedia page. Here I will post only the code of the function to make the conversion in R.First we write some functions to convert decimal numbers to binary numbers:decInt_to_8bit q r xx for(i in 1:precs){xx q r xx }rr return(rr)}devDec_to_8bit nas nbs xxs for(i in 1:precs){xxs...

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