Blog Archives

Comparing #rstats and #pdf15 intraday hashtag streams

June 15, 2015
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Comparing #rstats and #pdf15 intraday hashtag streams

This post is a lecture for IS624 Predictive Analytics, which is part of the CUNY Master’s program in Data Analytics. …Continue reading →

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Intraday time series analysis of the #rstats hashtag on Twitter

June 11, 2015
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Intraday time series analysis of the #rstats hashtag on Twitter

This post is a lecture for IS624 Predictive Analytics, which is part of the CUNY Master’s program in Data Analytics. …Continue reading →

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Chapter 4 of Modeling data with functional programming in R is out

May 30, 2015
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Chapter 4 of Modeling data with functional programming in R is out

This chapter is on what I call fold-vectorization. In some languages, it’s called reduce, though the concept is the same. …Continue reading →

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Chapter 3 of Modeling data with functional programming in R is out

February 8, 2015
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Chapter 3 of Modeling data with functional programming in R is out

Chapter 3 of my book “Modeling data with functional programming in R” is available for download. This chapter describes map-vectorization …Continue reading →

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How to reliably access network resources in R

January 21, 2015
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How to reliably access network resources in R

It’s frustrating when an application unexpectedly dies due to a network timeout or unavailability of a network resource. Veterans of …Continue reading →

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Type constraints and NAs in lambda.r

January 15, 2015
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Type constraints and NAs in lambda.r

Someone asked recently how lambda.r deals with NAs in type constraints. Type constraints are optional decorations on a function that …Continue reading →

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Automated parsing of ebola situation reports

January 5, 2015
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Automated parsing of ebola situation reports

I’m pleased to announce public availability of ebola.sitrep, a package I wrote to download and parse ebola situation reports. The …Continue reading →

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Me Meme: An adaptive news digest based on your interests

January 7, 2014
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Me Meme: An adaptive news digest based on your interests

About a month ago, I quietly released a daily news digest service, called Me Meme. This is an email companion …Continue reading →

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How to use vectorization to streamline simulations

January 6, 2014
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How to use vectorization to streamline simulations

While grading some homework it became apparent that many of the idioms of R are not widely known and aren’t …Continue reading »

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Probability and Monte Carlo methods

December 15, 2013
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Probability and  Monte Carlo methods

This is a lecture post for my students in the CUNY MS Data Analytics program. In this series of lectures …Continue reading »

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