Monthly Archives: December 2013

Response Time Percentiles for Multi-server Applications

December 25, 2013
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Response Time Percentiles for Multi-server Applications

In a previous post, I applied my rules-of-thumb for response time (RT) percentiles (or more accurately, residence time in queueing theory parlance), viz., 80th percentile: $R_{80}$, 90th percentile: $R_{90}$ and 95th percentile: $R_{95}$ to a cellphone application and found that the performance measurements were not completely consistent. Since the data appeared in a journal blog, I...

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Merry Christmas

December 25, 2013
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Merry Christmas. I am sorry to update this blog so late. Actually I was extremely busy in recent months because of my Ph.D application. Here is a simple Christmas Card powered by R to express my best wishes to you.  Sincerely hope all your Christmas dreams come true! View card. By the way, if you are interested … Continue reading...

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How fair is White Elephant?

December 24, 2013
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How fair is White Elephant?

This article was first published on analyze stuff. It has been contributed to Anything but R-bitrary in celebration of its introductory post.By Max Ghenis Welcome to analyze stuff! For our first post, I wanted to reflect on the time of year; after all, ‘tis the season for hams and yams, caroling and sledding, and of...

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24 Days of R: Day 24

December 24, 2013
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24 Days of R: Day 24

OK, so I phoned it in last night. Final post and maybe this one will be a bit better. Can't recall what got me thinking about it, but I was running over the issue of school performance and the erroneous notion that small class sizes will produce better students. This is occasionally debunked, but I

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Combining the Power of DeployR, rCharts, and AngularJS

December 24, 2013
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by Sheri Gilley, Principal UI Designer at Revolution Analytics Revolution R Enterprise DeployR is a server framework that exposes the R platform as a service allowing the integration of R statistics, analytics and visualizations inside Web, desktop and mobile applications. DeployR’s framework allows users to store and serve up R code that can then easily be used and reused...

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How fair is White Elephant?

December 24, 2013
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How fair is White Elephant?

Welcome to analyze stuff! For our first post, I wanted to reflect on the time of year; after all, ‘tis the season for hams and yams, caroling and sledding, and of course gifts! One popular party gift exchange game is the White Elephant, where each person brings a wrapped (typically regifted or otherwise odd-ball)...

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Sentence Drawing: Part II

December 23, 2013
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Sentence Drawing: Part II

In a recent blog post I introduced Stefanie Posavec‘s Sentence Drawings. We created this ggplot2 rendition: We left off weighing the aesthetics of the Sentence Drawing with information of quality visualizations. I asked others to think of ways to display … Continue reading →

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RcppZiggurat 0.1.0 (and 0.1.1): Faster N(0,1) RNGs

December 23, 2013
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Over the last few weeks I have been working on getting the Ziggurat normal random number generator updated and available in R. The Ziggurat generator provides a pretty unique combination of speed and good statistical properties for (standard) normal r...

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24 Days of R: Day 23

December 23, 2013
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24 Days of R: Day 23

Penultimate post, I'm going to take a quick look at the Gini indicator for wealth inequality. Data comes from the World Bank. I've downloaded the zipped file, decompressed it and given it a different name. I'm going to This will give us a decent set of data. How does this look when we plot it?

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Apache Spark for Big Analytics

December 23, 2013
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Apache Spark for Big Analytics

by Thomas Dinsmore, Director of Product Management at Revolution Analytics The emergence of Apache Spark is a key development for Big Analytics in 2013. Spark, an Apache incubator project, is an open source distributed computing framework for advanced analytics in Hadoop. Originally developed as a research project at UC Berkeley's AMPLab, the project achieved incubator status in Apache in...

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