6196 search results for "git"

Announcing the caretEnsemble R package

January 20, 2015
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Last week version 1.0 of the caretEnsemble package was released to CRAN. I have co-authored this package with Zach Mayer, who had the original idea of allowing for ensembles of train objects in the caret package. The package is designed to make it easy...

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Visualizing bivariate shrinkage

January 20, 2015
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Visualizing bivariate shrinkage

Inspired by this post about visualizing shrinkage on Coppelia, and this thread about visualizing mixed models on Stack Exchange, I started thinking about how to visualize shrinkage in more than one dimension. One might find themselves in this situation with a varying slope, varying intercept hierarichical (mixed effects) model, a model with two varying intercepts, etc. Then...

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Building a choropleth map of Italy using mapIT

January 19, 2015
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Building a choropleth map of Italy using mapIT

In the R environment, different packages to draw maps a

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Welcoming C++14

January 19, 2015
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Since last CRAN release of Rcpp11, I've started to work on the next iteration of R/C++ support with Rcpp14 by propagating changes to both implementations, e.g. the Strict class that I mentionned in this post. But now, I'm starting to make unique chan...

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Programming a Twitter bot – and the rescue from procrastination

January 19, 2015
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A considerable share of Twitter accounts is not actually run by humans. According to a recent release by Twitter, `up to approximately 8.5%' of the active users are bots or third-party software that automatically aggregates tweets. Bots can follow other users, retweet content or post content on their own. What they say is essentially generated by scripts. Take...

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R in Business Intelligence

January 18, 2015
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Business Intelligence (BI) can be simply described as extracting useful informations from the data. This is quite a broad process as the source data structure (and quality) can vary, as well the useful information structure can vary. More technically process of such transformation can be described as ETL (extract, transform, load), plus presentation of the useful information. The...

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R in Business Intelligence

January 18, 2015
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Business Intelligence (BI) can be simply described as extracting useful informations from the data. This is quite a broad process as the source data structure (and quality) can vary, as well the useful information structure can vary. More technically process of such transformation can be described as ETL (extract, transform, load), plus presentation of the useful information. The...

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Running UBSAN tests via clang with Rocker

January 18, 2015
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Every now and then we get reports from CRAN about our packages failing a test there. A challenging one concerns UBSAN, or Undefined Behaviour Sanitizer. For background on UBSAN, see this RedHat blog post for gcc and this one from LLVM about clang. I had written briefly about this before in a blog post introducing the...

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NASA GISS’s Annual Global Temperature Anomaly Trends (dplyr/ggplot version)

January 18, 2015
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NASA GISS’s Annual Global Temperature Anomaly Trends (dplyr/ggplot version)

D Kelly O’Day did a great post on charting NASA’s Goddard Institute for Space Studies (GISS) temperature anomaly data, but it sticks with base R for data munging & plotting. While there’s absolutely nothing wrong with base R operations, I thought a modern take on the chart using dplyr, magrittr & tidyr for data manipulation

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SAS PROC MCMC example in R: Logistic Regression Random-Effects Model

January 18, 2015
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In this post I will run SAS example Logistic Regression Random-Effects Model in four R based solutions; Jags, STAN, MCMCpack and LaplacesDemon. To quote the SAS manual: 'The data are taken from Crowder (1978). The Seeds data set is a 2 x 2 fa...

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