3273 search results for "MAP"

Exploring census and demographic data with R

December 25, 2013
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Exploring census and demographic data with R

I wanted to use R to explore how to access and visualize census data, home value data and school rating data using Indianapolis metro area as an example. My learning objectives here are to learn how to use R to: … Continue reading →

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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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Calculating Customer Lifetime Value with Recency, Frequency, and Monetary (RFM)

December 23, 2013
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Calculating Customer Lifetime Value with Recency, Frequency, and Monetary (RFM)

Introducing Customer Lifetime Value (CLV) Customer Lifetime Value is “the present value of the future cash flows attributed to the customer during his/her entire relationship with the company.”1 There are different kinds of formulas, from simplified to advanced, to calculate CLV.  But the following one might be the one being used most commonly:- Where, t

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A new Oce coastline

December 22, 2013
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A new Oce coastline

Part 1: coastal applications The oce package has a world coastline file that is visibly crude on a scale suitable for continental-shelf work.  At the cost of about 1 Mbyte of storage, a candidate for a replacement is a 1:10million scale version downloaded from naturalearthdata.com (full link below). As illustrated below with plots near two oceanographic centres, this candidate provides...

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24 Days of R: Day 21

December 21, 2013
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24 Days of R: Day 21

I drove through Tennessee today. Despite having grown up in Kentucky, I had never really noticed the Tennessee flag, but earlier this year, while in Nashville, I saw it and thought it was one of the cooler state flags. I downloaded a PNG file of the flag from wikicommons and tried to do what I

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Solstice sunrise-sunset

December 21, 2013
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Solstice sunrise-sunset

Introduction The sunAngle() function in the oce package provides a handy way to determine sunrise/sunset azimuth angles, and this is used to find alignments for the winter solstice in Halifax, NS. Methods First, set up the problem; these may be the only lines that need editing for other places or times. 1 2 3 t <- as.POSIXct("2013-12-21 17:11:00", tz="UTC") # winter solstice xy <- list(x=-63.60, y=44.65) ...

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Word Clouds using Text Mining

December 19, 2013
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Word Clouds using Text Mining

There was an interesting post on a blog which showed how straightforward it is to use the text mining tools (tm) from R along with the wordcloud package to create Word Clouds. Following the example from this page I processed the text of the Golden Asse book (found at Project Guttenberg) to generate a word

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Catastrophe Modeling for the Insurance Industry

December 19, 2013
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Catastrophe Modeling for the Insurance Industry

by Joseph Rickert At a Bay Area R User Group (BARUG) meeting this month hosted by Cisco, Dag Lohmann (the co-founder of Katrisk) gave an electrifying talk on catastrophe modeling for the insurance industry. Catastrophes: cyclones, hurricanes, floods earthquakes, terrorist attacks are rare events (from a statistical point of view) that cause losses and human suffering over large geographic...

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Converting graphs in pdf files to csv format

December 19, 2013
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Converting graphs in pdf files to csv format

Looking at a graph displayed as part of a pdf document is so tantalizing; I want that data as a csv! One way to get the data is to email the author(s) and ask for it. I do this regularly and sometimes get the apologetic reply that the data is confidential. But I can see

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OpenCPU 1.2: Flexible and reliable R function RPC over HTTPS + JSON

December 19, 2013
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OpenCPU 1.2: Flexible and reliable R function RPC over HTTPS + JSON

Earlier this week, OpenCPU 1.2 was released. This release uses the new jsonlite package for JSON conversion, which puts in place the final fundamental piece of the OpenCPU framework. This post describes what has changed, why this is important, and how to upgrade. From here, no major changes in the OpenCPU API...

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