In this post, we write a shiny app that lets you display and modify data that is stored in a database table. Shiny and Databases Everybody loves Shiny, and rightly so. It lets you publish reproducible research, brings R applications to non-R users, and can even serve as a general ... [Read more...]

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For this particular example,the variables of interest are stored as key:value pairs anda single data cell could contain multiple (unknown) number of key:value pairs.The objective is to separate these key-value pairs and store the values in co... [Read more...]

There’s an old saying that goes: “If you dream and want something hard enough, but have no commitment….then you’re probably full of shit”. After having finished the Getting and Cleaning Data course on Coursera, I haven’t typed a single line of R … Continue reading → [Read more...]

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Statisticians often need to integrate some function with respect to the multivariate normal (Gaussian) distribution, for example, to compute the standard error of a statistic, or the likelihood function in of a mixed effects model. In many (most?) useful cases, these integrals are intractable, and must be approximated using computational ... [Read more...]

For the problem I reported yesterday, in which my R package was working fine locally but failing on Travis, the key solution is to run update.packages(ask=FALSE) locally, and maybe even update.packages(ask=FALSE, type="source") to be sure to grab the source of packages for which ... [Read more...]

The RHadoop packages make it easy to connect R to Hadoop data (rhdfs), and write map-reduce operations in the R language (rmr2) to process that data using the power of the nodes in a Hadoop cluster. But getting the Hadoop cluster configured, with R and all the necessary packages installed ... [Read more...]

Jane Frazier spoke at our research team meeting today on “Reproducibility in computational research”. We had a very stimulating and lively discussion about the issues involved. One interesting idea was that reproducibility is on a scale, and we can all aim to move further along the scale towards making our ... [Read more...]

Jane Frazier spoke at our research team meeting today on “Reproducibility in computational research”. We had a very stimulating and lively discussion about the issues involved. One interesting idea was that reproducibility is on a scale, and we can all aim to move further along the scale towards making our ... [Read more...]

A bugfix release of RcppEigen is now on CRAN and in Debian. The NEWS file entry follows. Changes in RcppEigen version 0.3.2.5.1 (2015-09-23) Corrected use of kitten() thanks to Grant Brown (#21) Applied upstream change to protect agains... [Read more...]

Have you read Visualizing Algorithms by Mike Bostock? It's a pure gold post. In that post Mike show a static representation of a sort algorith and obvious it will fun to replicate that image with ggplot. So here we go. We need some sorts algorihms. In this link you can ... [Read more...]

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In this post, we do a brute force solution of Tic-Tac-Toe, the well-known 3*3 game. You’ll learn how data.tree can be used to build a tree of game history, and how the resulting data.tree structure can be used to analyse the game. This post is based on data.... [Read more...]

I've released BayesFactor 0.9.12-2 to CRAN; it should be available on all platforms now. The changes include:Added feature allowing fine-tuning of priors on a per-effect basis: see new argument rscaleEffects of lmBF, anovaBF, and generalTestBFFixed bug... [Read more...]

I've released BayesFactor 0.9.12-2 to CRAN; it should be available on all platforms now. The changes include:Added feature allowing fine-tuning of priors on a per-effect basis: see new argument rscaleEffects of lmBF, anovaBF, and generalTestBFFixed bug... [Read more...]

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Somehow when my code stops working, my first (and second, and third) reaction is to blame everything except my own code. (“It’s not me, it’s you.”) And almost always, it’s my own code that’s the problem (hence the title of this post). I spent the day ... [Read more...]

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