Blog Archives

R Studio and "Advanced R Development"

February 5, 2014
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R Studio and "Advanced R Development"

Well, I am tuning back in after a brief hiatus (what's a year-or-two-or-four between friends)?  Among other things, I just wrapped up a book for O'Reilly Media (Client-Server Web Apps with JavaScript and Java) due out in the Spring.   Please ...

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Github Follower Graph with R

May 17, 2012
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Github Follower Graph with R

Graph a github user's followers (and follower's followers).Each programming language tends to develop its own idiomatic set of data structures.  In R, data frames are often the structure of choice.  JSON (a subset of Javascript) has emerged a...

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Please Learn to Read

May 17, 2012
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There has been a lot of chatter during the past week on HN generated by with Jeff Atwood's "Please don't learn to code".  Actual posts included:Please don't learn to code (www.codinghorror.com) Please Don't Become Anything, Especially Not A P...

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Log File Analysis with R

February 21, 2012
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Log File Analysis with R

 R often comes up in discussions of heavy duty scientific and statistical analysis (and so it should).  However, it is also incredibly handy for a variety of more routine developer activities.   And so I give you… log file analysis with R!  I was just involved in the launch of gradesquare.com (go ahead – click...

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Word Cloud from Blog RSS

September 2, 2011
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Word Cloud from Blog RSS

Crazy busy  - no time to blog recently. Time enough for pretty pictures based upon previous words though...(thanks http://www.wordle.net).

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Ten News Stories of 2010 – and the Statistics that Made Them

January 1, 2011
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Ten News Stories of 2010 – and the Statistics that Made Them

Significance MagazineAccording to Significance Magazine (jointly published by Royal Statistical Society and the American Statistical Association) the following are the top ten stories of 2010.1. Progress in the preven...

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R-Chart: Year End Wrap Up

December 31, 2010
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R-Chart: Year End Wrap Up

Thanks to everyone who visited and commented here at R-Chart over the last year!  Blogging has forced me to crystallize my thoughts and I hope others have benefited a bit from these meanderings.  It it great to interact with the&nbs...

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Google AI Challenge: Scores/Rank by Language

December 8, 2010
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Google AI Challenge: Scores/Rank by Language

A quick follow up to the previous post: about the the scores in the 2010 Google AI competition relative to programming language.  The chart above makes each language visible and discrete - and the scales are the same.library(ggplot2)df<- read.c...

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Google AI Challenge: Languages Used by the Best Programmers

December 2, 2010
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Google AI Challenge: Languages Used by the Best Programmers

The Google AI Challenge recently wrapped up with a Lisp developer from Hungary as the winner.  The competition challenges contestants to create bots that push the limits of AI and game theory.  These bots compete against one another, and a complete ranking of competitors is available.  The big story today is...

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Mortgage Calculator (and Amortization Charts) with R

November 10, 2010
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Mortgage Calculator (and Amortization Charts) with R

Mortgage rates have been at historic lows recently.  The rates are posted various places online along with simple mortgage calculators.  Such calculators illustrate the payment schedule for a mortgage based upon selected terms. But with less ...

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