https://www.rostrum.blog/tags/stringr/ Recent content in Stringr on rostrum.blog Hugo -- gohugo.io en-gb Sat, 16 May 2020 00:00:00 +0000 https://www.rostrum.blog/2020/05/16/postcode-pandemonium/ Sat, 16 May 2020 00:00:00 +0000 https://www.rostrum.blog/2020/05/16/postcode-pandemonium/ Postcodes in Bath are unlikely to score highly (via Wikimedia) tl;dr I used the R package {data.table} to find the highest- and lowest-scoring UK postcodes based on the sum of their numbers and letters (A = 1, B = 2, etc). You can jump to the results. The premise Yesterday I noticed that the hashtag #PostcodePandemonium was trending on Twitter.1 The premise was to sum the numbers and letters in your postcode, where the letters have been converted to their position in the alphabet (i. https://www.rostrum.blog/2019/12/08/altcheckr/ Sun, 08 Dec 2019 00:00:00 +0000 https://www.rostrum.blog/2019/12/08/altcheckr/ tl;dr I’ve made a small R package called {altcheckr} that checks the accessibility of images on web pages. It has functions that (1) scrape attributes from HTML elements on a web page and (2) apply simple rules to indicate the suitability of the alt text provided. To use: remotes::install_github("matt-dray/altcheckr") images <- alt_get("https://www.bbc.co.uk/news") alt_check(images) I’m not an expert and the package has not been user tested. Accessibility A web site is accessible if everyone can engage with its content. https://www.rostrum.blog/2018/12/24/nba-travel/ Mon, 24 Dec 2018 00:00:00 +0000 https://www.rostrum.blog/2018/12/24/nba-travel/ Classic Jazz: Stockton to Malone for the dunk (via Giphy) Note The original version of this post (December 2018) used the {gmapsdistance} package. I updated it extensively in 2020 to use the {osrm} package, which doesn’t require an API key nor billing details. tl;dr The {osrm} R package can retrieve from the OSRM API the travel duration between points. https://www.rostrum.blog/2018/04/27/two-dogs-in-toilet-elderly-lady-involved/ Fri, 27 Apr 2018 00:00:00 +0000 https://www.rostrum.blog/2018/04/27/two-dogs-in-toilet-elderly-lady-involved/ Matt Dray (@mattdray) Call the fire brigade. Oh wait, we’re fine. TL;DR Animals get stuck in weird places, just ask the London Fire Brigade. I used the sf package for handling some animal rescue spatial data prior to interactive mapping with leaflet. Scroll to the bottom to see the map. The problem Sometimes I work with eastings and northings coordinate data. https://www.rostrum.blog/2018/04/14/r-trek-exploring-stardates/ Sat, 14 Apr 2018 00:00:00 +0000 https://www.rostrum.blog/2018/04/14/r-trek-exploring-stardates/ Captain’s log Star date 71750.51. Our mission is to use R statistical software to extract star dates mentioned in the captain’s log from the scripts of Star Trek: The Next Generation and observe their progression over the course of the show’s seven seasons. There appears to be some mismatch in the frequency of digits after the decimal point – could this indicate poor ability to choose random numbers?