A new version 0.4.10 of RQuantLib just got onto CRAN; a Debian upload will follow in due course. QuantLib is a very comprehensice free/open-source library for quantitative finance; RQuantLib connects it to the R environment and language. This version... [Read more...]

I’m a scientist. Or at least that’s how we describe our job title at the lab. I’m a scientist studying psychological science. Sometimes we do what we consider important work, like using our expertise for depression detection and prevention [1], but sometimes we do stuff because it’s ... [Read more...]

You need to declare generic functions in S4 before you can define methods for them. If no definition exists you will see the following error: Generic functions are declared with the setGeneric() function, which must precede the call to setMethod(): But when you develop an R package you may have ... [Read more...]

This post is kept (literally) minimal to demonstrate how simple is this hack using R (of course could be simple in other languages too). This is also to establish a point that R has got use-cases beyond statistics and data-mining. Objective rstats subreddit is one of the popular sources of ... [Read more...]

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Working with percentages in R can be a little tricky, but it’s easy to change it to an integer, or numeric, and run the right statistics on it. Such as quartiles and mean and not frequencies. Essentially you are using the sub function and substituting the “%” for a blank. ... [Read more...]

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Philosophy This Post is purely aimed at helping beginners with cookbook-style code for Interactive Visualizations using highcharter package in R. About highcharter highcharter by Joshua Kunst R package is a wrapper for the ‘Highcharts’ library including shortcut functions to plot R objects. ‘Highcharts’ http://www.highcharts.com/ is a charting ... [Read more...]

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This note documents how the sample() function has changed since R 3.6.0, and how to reproduce its previous behaviour. A recent blog post by Christian Robert reminded me that R had to fix its sample() function in R 3.6.0 and above. The issue that used... [Read more...]

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Welcome to the 23nd post in the rationally reasonable R rants series, or R4 for short. Today’s post was motivated by an exchange on the r-devel list earlier in the day, and a few subsequent off-list emails. Roger Koenker posted a question: how to b... [Read more...]

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Animated illustrations of how arguments affect output of `stats::density()`. Prologue In R, one of the “go to” functions for kernel density estimation is density() from base R package ‘stats’. Given numeric sample, it returns a set of x-y pairs on estimated density curve. It is also a main “workhorse” ... [Read more...]

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