In the exercises below we cover the basics of index vectors. Before proceeding, first read section 2.7 of An Introduction to R, and the help pages for the sum, and which functions. Answers to the exercises are available here. Exercise 1 If x [Read more...]

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In the development version of R (to be R 3.3.0), it is possible again to save the result of recordPlot() from one R session and then load it and replay it, with replayPlot(), in a different R session. This recording … Continue reading → [Read more...]

Di Cook and I are organizing a workshop on “Making data analysis easier” for 18-19 February 2016. We are calling it WOMBAT2016, which an acronym for Workshop Organized by the Monash Business Analytics Team. Appropriately, it will be held at the Melbourne Zoo. Our plan is to make these workshops an ... [Read more...]

Different from the confidence interval that is to address the uncertainty related to the conditional mean, the prediction interval is to accommodate the additional uncertainty associated with prediction errors. As a result, the prediction interval is always wider than the confidence interval in a regression model. In the context of ... [Read more...]

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The M3 forecasting competition The M3 forecasting competition in 2000, organized by Spyros Makridakis and Michele Hibon, tested a variety of methods against 3,003 time series, with forecasts compared to held out test sets. The data are conveniently available for R users in the Mcomp package and Rob Hyndman has published example ... [Read more...]

is, I think, the one you can find at sacred-texts.org. curl -O 'http://www.sacred-texts.com/dna/hgp011k.htm' #get it #BORING DATA JANITORSHIP tail -n +15 hgp011k.htm __ hgp011k #remove the HTML head stuff .. up to head -n -3 hgp011k | sponge hgp011k #remove the ... [Read more...]

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After a short hiatus, a new version of the (wonderfully useful, if I dare say so ;-) RcppTOML package is now on CRAN. RcppTOML lets R read the (absolutely awesome) TOML configuration file format--which is simply fabulous as it emphasizes strong reada... [Read more...]

[social4i size=”large” align=”float-right”] Guest post by Kirill Eremenko Source: www.tableau.com I teach Tableau through Udemy, and would like to [Read more...]

About a year ago I posted about men's and women's marathon (and longer) distance races from the Arrs.net dataset.  In the meantime, Shiny development and the open source announcement of plot.ly have brought data visualization to the next level.  As an avid (at least former) runner, exploring marathon ... [Read more...]

About a year ago I posted about men's and women's marathon (and longer) distance races from the Arrs.net dataset.  In the meantime, Shiny development and the open source announcement of plot.ly have brought data visualization to the next level.&nb... [Read more...]

My screen has been filled with ads from BayesiaLab since I downloaded their free book. Just as I began to have regrets, I received an email invitation to try out their demo datasets. I was especially interested in their perfume ratings data. In this monadic product test, each of 1,321 French ... [Read more...]

My screen has been filled with ads from BayesiaLab since I downloaded their free book. Just as I began to have regrets, I received an email invitation to try out their demo datasets. I was especially interested in their perfume ratings data. In this mo... [Read more...]

I'm recently returned from the 2015 Rocky Mountain Bioinformatics Conference, where I presented the above poster. This is work with a colleague, Rick Gray, at the FDA. He and I collaborate on our NIH award "Optimal Design of Challenge-Response Experiments in Cardiac Electrophysiology" (HL118392) The (original) poster abstract is below, but ... [Read more...]

In the exercises below we cover the basics of character vectors. Before proceeding, first read section 2.6 of An Introduction to R, and the help pages for the nchar, substr and sub functions. Answers to the exercises are available here. Exercise 1 If x [Read more...]

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Buzzfeed isn't just listicles and cat videos these days. Science journalist Peter Aldhous recently joined Buzzfeed's editorial team, after stints at Nature, Science and New Scientist magazines. He brings with him his data journalism expertise and R programming skills to tell compelling stories with data on the site. His stories, ... [Read more...]