December 2011

Interview with Kai Chew, CloudStat

December 31, 2011 | CloudStat

Here is an interview with Kai Chew, Founder of Cloudstat. CloudStat is developing a cloud-based statistical platform to help researchers who want to make sense of data to do statistical analysis collaboratively with its high performance computing infra... [Read more...]

BIG Data

December 31, 2011 | Dave Giles

"Big Data" = data that come in amounts that are too large for current computer hardware and software to deal with. That sounds like fun!Norman Nie developed the well known SPSS statistical package in the 1960, and is currently President and CEO of Revolution Analytics, a California company that promotes the ... [Read more...]

Is R turning into an operating system?

December 31, 2011 | mages

Over the years I convinced my colleagues and IT guys that R and LaTeX/XeLaTeX is the way forward to produce lots of customer reports with individual data, charts, analysis and text. Success!But of course the operating system in the office is still MS W...
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Say Hi to CloudStat!

December 30, 2011 | CloudStat

Hello and welcome to the CloudStat official blog! We’ll be using this space to talk about product updates, getting the most out of CloudStat, and random thoughts on data analysis learning, especially in R language. More about CloudStat can be vie... [Read more...]

Initial impressions of RangeLab

December 30, 2011 | Derek-Jones

I was rummaging around in the source of R looking for trouble, as one does, when I came across what I believed to be a less than optimally accurate floating-point algorithm (function R_pos_di in src/main/arithemtic.c). Analyzing the accuracy of floating-point code is notoriously difficult and ... [Read more...]

MuroBBS Programming Challenge 1

December 30, 2011 | rocknrblog

It’s been a while since the last post. I started my studies as a statistics major in university and have been doing little with R but mostly just reading other blogs and taking our university’s R course which was just … Continue reading → [Read more...]

Over on F1DataJunkie, 2011 Season Review Doodles…

December 30, 2011 | Tony Hirst

Things have been a little quiet, post wise here, of late, in part because of the holiday season… but I have been posting notes on a couple of charts in progress over on the F1DataJunkie blog. Here are links to the posts in chronological order – they capture the evolution ... [Read more...]

RcppExamples 0.1.3

December 30, 2011 | Thinking inside the box

A minor new release of the RcppExamples package is now on CRAN. RcppExamples contains a few illustrations of how to use Rcpp. It grew out of documentation for the classic API (now in its own package RcppClassic), and while we added a few more funct... [Read more...]

You’ve got the whole world in your portfolio

December 29, 2011 | dan

A famous finance professor once told us that good diversification meant holding everything in the world. Fine, but in what proportion? Suppose you could invest in every country in the world. How much would you invest in each? In a market-capitalization weighted index, you'd invest in each country in proportion ... [Read more...]

Benchmarking time series models

December 29, 2011 | Zach Mayer

This is a quick post on the importance of benchmarking time-series forecasts.  First we need to reload the functions from my last few posts on times-series cross-validation.  (I copied the relevant code at the bottom of this post so you don't... [Read more...]

dcemriS4 0.46

December 29, 2011 | Brandon Whitcher

The R package dcemriS4 provides routines for the quantitative analysis of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI), along with quantification of diffusion-weighted MRI (ADC = apparent diffusion coefficient) and quantitative T2 map... [Read more...]

Weecology can has new mammal dataset

December 29, 2011 | Scott Chamberlain

So the Weecology folks have published a large dataset on mammal communities in a data paper in Ecology.  I know nothing about mammal communities, but that doesn't mean one can't play with the data...Their dataset consists of five csv files: &...
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Magnetic Resonance Imaging in R

December 29, 2011 | Brandon Whitcher

Volume 44 of the Journal of Statistical Software was published in October 2011.  The special volume on “Magnetic Resonance Imaging in R” features articles and packages related to a variety of imaging modalities:functional MRIdiffusion-weighted MRIdynamic contrast-enhanced MRIdynamic susceptibility-contrast MRI structural MRIThe papers describe the methodology, software implementation and provide comprehensive examples ... [Read more...]

How much is a shower?

December 29, 2011 | Karsten W.

After looking at my heating expenses, I turned to the costs for water heating. For some time, I looked at my water meter before and after taking a shower or a bath. Quite often, I forgot one or the other measurement, but I collected about 40 observations. Here is what they ...
[Read more...]
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