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There’s nothing more frustrating than waiting for long-running R scripts to iteratively run. I’ve recently come across a new-ish package for parallel processing that plays nicely with the tidyverse: multidplyr. The package has saved me countless ho... [Read more...]

This app is based on the gwascat R package and its ebicat38 database and shows trait-associated SNP locations of the human genome. You can visualize and compare the genomic locations of up to 8 traits simultaneously. The National Human Genome Research... [Read more...]

A bit more on our replyr R package. library("replyr") help(let, package='replyr') let {replyr} R Documentation Prepare expr for execution with name substitutions specified in alias. Description replyr::let implements a mapping from desired names (names used directly in the expr code) to names used in the data. ... [Read more...]

Most companies make extensive use of spreadsheets to store, work and share data internally. For years, Excel has been the main software that allowed people to share internal data. But using Excel for reporting has its drawbacks: First manually updating data into spreadsheets is time-consuming and takes a large amount ... [Read more...]

Seasonal air pollution in India The motivation for this blog post was a conference paper I recently heard that analysed five years of daily pollution data in an India city with a non-seasonal auto-regressive integrated moving average (ARIMA) model. In discussion after the presentation, there were differing views on whether ... [Read more...]

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A celebration of R - In just two months time, the second satRday will be taking place right on my doorstep, in Cape Town, South Africa. I keep telling people I am looking forward to it, but to be honest that’s really quite an understatement. I a... [Read more...]

A celebration of R - In just two months time, the second satRday will be taking place right on my doorstep, in Cape Town, South Africa. I keep telling people I am looking forward to it, but to be honest that’s really quite an understatement. ... [Read more...]

It is interesting to try and figure out what picture emerges from a join-the-dots puzzle (connect-the-dots in some parts of the world). Let’s have a go at some lightweight automatic generation such a puzzle (some heavy-weight techniques). If an image is available, expressed as an boolean matrix, R’s ... [Read more...]

Yesterday at PASS Meetup Munich, I talked about R for SQListas – thanks again for your interest and attention guys, it was a very nice evening! Actually, in addition to the content from that original presentation, which I’ve also covered in two recent blog posts (R for SQListas(1): Welcome to ... [Read more...]

by Jonathan Regenstein In a previous post, we built an R Notebook that laid the groundwork for a Shiny app that allows users to graph country ETFs by clicking on a world map. In today’s Fun Friday post, we’ll charge forth to build that app, again using a ... [Read more...]

As Google learned, predicting the spread of influenza, even with mountains of data, is notoriously difficult. Nonetheless, bioinformatician and R user Shirin Glander has created a two-part tutorial about predicting flu deaths with R (part 2 here). The analysis is based on just 136 cases of influenza A H7N9 in China ... [Read more...]

I’ve been drafting a new R package — sergeant — to work with Apache Drill and have found it much easier to manage having Drill operating in a single node cluster vs drill-embedded mode (esp when I need to add a couple more nodes for additional capacity). That means running Apache ... [Read more...]

R has excellent tools for dates and times. The Date and POSIXct classes (as well as the 'wide' representation in POSIXlt) are versatile, and a lot of useful tooling has been built around them. However, POSIXct is implemented as a double with fractional seconds since the epoch. Given the 53 bits ... [Read more...]

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