Monthly Archives: September 2010

Making sense of MapReduce

September 24, 2010
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From guest blogger Joseph Rickert. Last night I went to hear Ken Krugler of Bixolabs talk about Hadoop at the monthly meeting of the Software Developers Forum. Maybe because Ken is an unusually lucid speaker, or maybe because I just reached some sort of cumulative tipping point through the prep work of all those patient people who have tried...

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Arctic Oscillation: 1 – Trends

September 24, 2010
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Arctic Oscillation: 1 – Trends

arctic oscillation (AO): 1 -  trends Since 1950 In this post, I begin a series on the Arctic Oscillation (AO) .  This post  presents a chart of monthly AO Index from 1950 to the present and introductory information on AO … Continue reading ...

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Connecting to a MongoDB database from R using the C API for MongoDB

September 24, 2010
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Today, Neil posted an article titled" Connecting to a MongoDB database from R using Java". In the current post, I'll show how to use the C API for MongoDB to fetch some MongoDB data from R. The code will be somehow similar to my previous post "A stateful C function for R: parsing Fasta sequences".OK, First, let's...

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Connecting to a MongoDB database from R using the C API for MongoDB

September 24, 2010
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Today, Neil posted an article titled" Connecting to a MongoDB database from R using Java". In the current post, I'll show how to use the C API for MongoDB to fetch some MongoDB data from R. The code will be somehow similar to my previous post "A stateful C function for R: parsing Fasta sequences".OK, First, let's...

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R / Finance 2011 Call for Papers

September 24, 2010
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Brian announced it on r-help and r-sig-finance and I have since updated the R/Finance website and Call for Papers page. And as David Smith already outblogged me about it, without further ado our Call for Paper for next spring's R/Finance conference: ...

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R / Finance 2011 Call for Papers

September 24, 2010
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Brian announced it on r-help and r-sig-finance and I have since updated the R/Finance website and Call for Papers page. And as David Smith already outblogged me about it, without further ado our Call for Paper for next spring's R/Finance conference: ...

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R / Finance 2011 Call for Papers

September 24, 2010
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Brian announced it on r-help and r-sig-finance and I have since updated the R/Finance website and Call for Papers page. And as David Smith already outblogged me about it, without further ado our Call for Paper for next spring's R/Finance conference: ...

Read more »

Connecting to a MongoDB database from R using Java

September 24, 2010
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Connecting to a MongoDB database from R using Java

It would be nice if there were an R package, along the lines of RMySQL, for MongoDB. For now there is not – so, how best to get data from a MongoDB database into R? One option is to retrieve JSON via the MongoDB REST interface and parse it using the rjson package. Assuming, for

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More AQP (algorithms for quantitative pedology) Examples

September 23, 2010
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The aqp package can be downloaded from R-Forge. read more

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Higher Order Functions in R

September 23, 2010
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Introduction Because R is, in part, a functional programming language, the ‘base’ package contains several higher order functions. By higher order functions, I mean functions that take another function as an argument and then do something with that function. If you want to know more about the usefulness of writing higher order functions in general,

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