This post will go through how to create a word cloud of article titles scraped from the awesome R-bloggers. Our goal will be to use R’s rvest package to search through 50 successive pages on the site for article titles. The stringr and tm packages will be used for string cleaning and for creating a The post Creating a...
So…you want to play a pRank with R? This short post will give you a fun function you can use in R to help you out! How to change a file’s modified time with R Let’s say we have a file, test.txt. What if we want to change the last modified date of the file The post So you...
This post will go through 10 different Linux commands and their R alternatives. If you’re interested in learning more R functions for working with files like some of those below, also check out this post. How to list all the files in a directory Linux R What does it do? ls list.files() Lists all the The post 10 R...
So you know lapply, sapply, and apply…but…what about rapply, vapply, or eapply? These are generally a little less known as far as the apply family of functions in R go, so this post will explore how they work. rapply Let’s start with rapply. This function has a couple of different purposes. One is to recursively The post Those “other”...
In a prior post, we covered how to run Python from the Task Scheduler on Windows. This article is similar, but it’ll show how to run R from the Task Scheduler, instead. Similar to before, let’s first cover how to R from the command line, as knowing this is useful for running it from the The post How to...
In a previous post, we showed how using vectorization in R can vastly speed up fuzzy matching. Here, we will show you how to use R’s vectorization functionality to efficiently build a logistic regression model. Now we could just use the caret or stats packages to create a model, but building algorithms from scratch is The post How to...
If you’re an avid R user, you probably use the famous dplyr package. Python has a package meant to be similar to dplyr, called dplython. This article will give an introduction for how to use dplython. For the examples below, we’ll use a sample dataset that comes with R giving attributes about the US states, The post Dpylthon…dplyr for...
Earlier this year, a new package called tabulizer was released in R, which allows you to automatically pull out tables and text from PDFs. Note, this package only works if the PDF’s text is highlightable (if it’s typed) — i.e. it won’t work for scanned-in PDFs, or image files converted to PDFs. If you don’t The post Getting data...
In a previous post, I gave an introduction to the yahoo_fin package. The most updated version of the package includes new functionality allowing you to scrape live stock prices from Yahoo Finance (real-time). In this article, we’ll go through a couple ways of getting real-time data from Yahoo Finance for stocks, as well as how The post How to...
In a previous post, we showed how RoboBrowser can be used to fill out online forms for getting historical weather data from Wunderground. This article will talk about how to use RoboBrowser to batch download collections of image files from Pexels, a site which offers free downloads. If you’re looking to work with images, or The post How to...
