Posts Tagged ‘ applications ’

Arctic sea-ice at lowest levels since observations began

August 28, 2012
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Arctic sea-ice at lowest levels since observations began

RealClimate.org used the R language and data from the National Snow and Ice Data Center to create this chart showing the extent of Arctic sea-ice in each year since satellite observations began in 1978, and the current extent of ice coverage (in red). Even though there are several weeks of annual melting yet to come, the area of ice...

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How Williams Sonoma uses R to target customers online

August 16, 2012
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How Williams Sonoma uses R to target customers online

If you live in the US, you've probably visited a Williams Sonoma store for gourmet food or quality cookware for the kitchen. And if you've shopped at Pottery Barn or West Elm stores for furniture, those chains are part of the Williams Sonoma stable as well. All three brands have major online stores, all supported by a sophisticated marketing...

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Is gas cheaper than it used to be?

August 14, 2012
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Is gas cheaper than it used to be?

Biostatistician and R user Matt Cooper noticed recently that the price he pays for petrol (gasoline) at the pump in Perth, Australia was about the same as he was paying four years ago. Nonetheless, inflation has marched on over the years, so does that mean petrol is effectively cheaper now than it used to be? And how does the...

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The Environmental Performance Index, visualized with R

July 31, 2012
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The Environmental Performance Index, visualized with R

The Environmental Performance Index (EPI) ranks countries on performance indicators for environmental public health and ecosystem vitality. Yale University hosts the EPI website, which was used to present the 2012 EPI Rankings to world leaders at the 2012 World Economic Forum at Davos. The Country Profiles section of the website allowed members to browse the performance characteristics of their...

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R Journal, June 2012

July 20, 2012
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The June 2012 issue of the R Journal, the peer-reviewed open-journal about R packages and applications of R, is now available. This issue includes articles about: Efficiently calling C functions from R without the need for wrapper code Using clusters of Macs running Apple Xgrid for parallel distributed processing with R Semi-automated text classification with the 'maxent' package Two...

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Applications of R at Google

July 13, 2012
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At a talk I saw at the useR!2012 conference last month, Googler Karl Millar estimated that there are at least 200 active R users at Google, plus another 300+ occasional users participating in Google's internal R support list. But what are all these Google employees doing with R? A post from the Google Research team published on Google+ yesterday...

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Three hours of pure soccer emotion, visualized with R

July 6, 2012
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Three hours of pure soccer emotion, visualized with R

The biggest prize in UK soccer, the Premier League Championship, is decided by a points system. Unlike most sports competitions, there's no final round or playoff series: once the regular round of games is complete, the team that has accumulated the most points (three for a win, and one for a draw) is the champion of English football. In...

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Trying for a baby? Here’s how long it might take.

June 29, 2012
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Trying for a baby? Here’s how long it might take.

Wanting to start a family the natural way? For a healthy 45-year-old woman, you may be in for a five-year wait. That's the conclusion of Richie Cotton, a UK-based data scientist, who discovered when he and his girlfriend wanted to start a family that statistics on how long it takes to get pregnant are hard to come by. The...

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More on birthday probabilities

June 15, 2012
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More on birthday probabilities

Last week, Joe Rickert used R and four years of US Census data to create an image plot of the relative probabilities of being born on a given day of the year: Chris Mulligan also tackled this problem with R, but this time using 20 years of Census data from 1969 to 1988. Chris extracted the birthday frequencies using...

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Data distillation with Hadoop and R

June 11, 2012
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Data distillation with Hadoop and R

We're definitely in the age of Big Data: today, there are many more sources of data readily available to us to analyze than there were even a couple of years ago. But what about extracting useful information from novel data streams that are often noisy and minutely transactional ... aye, there's the rub. One of the great things about...

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