Blog Archives

Big data for R

August 5, 2010
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Big data for R

Revolutions Analytics recently announced their "big data" solution for R. This is great news and a lovely piece of work by the team at Revolutions. However, if you want to replicate their analysis in standard R, then you can absolutely do so and we show you how.

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Area Plots with Intensity Coloring

July 13, 2010
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Area Plots with Intensity Coloring

I am not sure apeescape’s ggplot2 area plot with intensity colouring is really the best way of presenting the information, but it had me intrigued enough to replicate it using base R graphics. The key technique is to draw a gradient...

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Area Plots with Intensity Coloring

July 13, 2010
By
Area Plots with Intensity Coloring

I am not sure apeescape’s ggplot2 area plot with intensity colouring is really the best way of presenting the information, but it had me intrigued enough to replicate it using base R graphics. The key technique is to draw a gradient...

Read more »

Employee productivity as function of number of workers revisited

June 22, 2010
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Employee productivity as function of number of workers revisited

We have a mild obsession with employee productivity and how that declines as companies get bigger. We have previously found that when you treble the number of workers, you halve their individual productivity which is mildly scary. We revisit the analysis for the...

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Employee productivity as function of number of workers revisited

June 22, 2010
By
Employee productivity as function of number of workers revisited

We have a mild obsession with employee productivity and how that declines as companies get bigger. We have previously found that when you treble the number of workers, you halve their individual productivity which is mildly scary. We revisit the analysis for the...

Read more »

Comparing standard R with Revoutions for performance

June 17, 2010
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Comparing standard R with Revoutions for performance

Following on from my previous post about improving performance of R by linking with optimized linear algebra libraries, I thought it would be useful to try out the five benchmarks Revolutions Analytics have on their Revolutionary Performance pages.

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Comparing standard R with Revoutions for performance

June 17, 2010
By
Comparing standard R with Revoutions for performance

Following on from my previous post about improving performance of R by linking with optimized linear algebra libraries, I thought it would be useful to try out the five benchmarks Revolutions Analytics have on their Revolutionary Performance pages.

Read more »

Faster R through better BLAS

June 15, 2010
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Faster R through better BLAS

Can we make our analysis using the R statistical computing and analysis platform run faster? Usually the answer is yes, and the best way is to improve your algorithm and variable selection. But recently David Smith was suggesting that a big benefit of their (commercial) version of R...

Read more »

Faster R through better BLAS

June 15, 2010
By
Faster R through better BLAS

Can we make our analysis using the R statistical computing and analysis platform run faster? Usually the answer is yes, and the best way is to improve your algorithm and variable selection. But recently David Smith was suggesting that a big benefit of their (commercial) version of R...

Read more »

R: Eliminating observed values with zero variance

March 8, 2010
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R: Eliminating observed values with zero variance

I needed a fast way of eliminating observed values with zero variance from large data sets using the R statistical computing and analysis platform. In other words, I want to find the columns in a data frame that has zero variance. And as fast as possible, because my data sets are large, many, and changing fast....

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