class: center, middle, inverse, title-slide # <div class="line-block">Getting Started in R<br /> an introduction to data analysis and visualisation</div> ## Reading in Data from API ### Réka Solymosi & Sam Langton --- class: inverse, center, middle # API --- ### What are APIs? ###A set of functions and procedures that allow the creation of applications which access the features or data of an operating system, application, or other service. --- ### What are APIs? ###You’ve probably heard of companies packaging APIs as products. For example, Weather Underground sells access to its weather data API. --- ### Example: Twitter API <img src="https://static-content.springer.com/image/art%3A10.1186%2Fs40163-015-0023-8/MediaObjects/40163_2015_23_Fig3_HTML.gif" height="400px" /> [Spatio-temporal crime hotspots and the ambient population](https://link.springer.com/article/10.1186/s40163-015-0023-8) --- ### Example: Twitter API <img src="https://img.washingtonpost.com/wp-apps/imrs.php?src=https://img.washingtonpost.com/news/the-intersect/wp-content/uploads/sites/32/2016/09/alt-right-radicalization.png&w=1484" height="400px" /> [These charts show exactly how racist and radical the alt-right has gotten this year](https://www.washingtonpost.com/news/the-intersect/wp/2016/09/26/these-charts-show-exactly-how-racist-and-radical-the-alt-right-has-gotten-this-year/?utm_term=.a7139c409e4b) --- ### Authentication ###To access the API you need credentials [dev.twitter.com](https://dev.twitter.com/) --- ### Script to get data ###To access the API you need a script to get data ```r library(twitteR) twitter_result <- searchTwitter(search_word, n=number_of_tweets, geocode= paste(loc_of_tweets, search_radius, sep=",")) ``` --- ### Let's try!