Monthly Archives: February 2015

A Machine Learning Result

February 5, 2015
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A Machine Learning Result

by Joseph Rickert Learning to effectively use any of the dozens of popular machine learning algorithms requires mastering many details and dealing with all kinds of practical issues. With all of this to consider, it might not be apparent to a person coming to machine learning from a background other than computer science or applied math that there are...

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Introducing drat: Lightweight R Repositories

February 5, 2015
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A new package of mine just got to CRAN in its very first version 0.0.1: drat. Its name stands for drat R Archive Template, and an introduction is provided at the drat page, the GitHub repository, and below. drat builds on a core strength of R: the ability to query multiple repositories. Just how one could always query, say, CRAN,...

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Free online data mining and machine learning courses by Stanford University

February 5, 2015
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Free online data mining and machine learning courses by Stanford University

by Yanchang Zhao, RDataMining.com Three free online data mining and machine learning courses lectured by professors at Stanford University started in past two weeks, which provide excellent opportunities to learn advanced data mining and machine learning techniques. If you are … Continue reading →

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sjPlot package and related online manuals updated #rstats # ggplot

February 5, 2015
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sjPlot package and related online manuals updated #rstats # ggplot

My sjPlot package for data visualization has just been updated on CRAN. I’ve added some features to existing function, which I want to introduce here. Plotting linear models So far, plotting model assumptions of linear models or plotting slopes for each estimate of linear models were spread over several functions. Now, these plot types have

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Simulating movement on a grid in R

February 4, 2015
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Simulating movement on a grid in R

In this post I outline a way of simulating movement on a grid in R in a time efficient way. This is part of a simulation of tsetse fly populations I’ve been developing. Earlier posts outline some of the background and use of arrays as the main data structure. My remit is to recreate in R an existing simulation developed...

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A Step to the Right in R Assignments

February 4, 2015
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I received an out-of-band question on the use of %% in my CDC FluView post, and took the opportunity to address it in a broader, public fashion. Anyone using R knows that the two most common methods of assignment are the venerable (and sensible) left arrow

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Quickcheck: Randomized unit testing for R

February 4, 2015
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Hadley Wickham's testthat package has been a boon for R package authors, making it easy to write tests to verify that your code is working directly, and alerting you when you make changes to your code that inadvertently breaks things. For the RHadoop project, though, developer Antonio Piccolboni needed a different testing framework, that included the possibility of writing...

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Many package updates on CRAN

February 4, 2015
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Many package updates on CRAN

Over the last week or two I’ve been pushing all my packages to CRAN. pathological (for working with file paths), runittotestthat (for converting RUnit tests to testthat tests), and rebus (formerly regex, for building regular expressions in a human readable way) all make their CRAN debuts. assertive, for run-time testing your code has more checks

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The R Journal, Volume 6/2, December 2014 – is now online!

February 4, 2015
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The new issue of The R Journal is now available! You may Download the complete issue, or choose your pleasure from the following links: Table of contents Editorial Deepayan Sarkar Contributed Research Articles Coordinate-Based Meta-Analysis of fMRI Studies with R Andrea Stocco Automatic Conversion of Tables to LongForm Dataframes Jimmy Oh Prinsimp Jonathan Zhang, Nancy Heckman, Davor Cubranic, Joel G. Kingsolver, Travis...

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Predicting the six nations

February 4, 2015
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Predicting the six nations

By Douglas Ashton – Consultant, UK I don’t know a lot about rugby, which can be a problem living in a rugby town. Especially when the office sweep stake on the upcoming Wales vs England six nations game goes round: … Continue reading →

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