Preparing data

- [Instructor] For building the word cloud in R, … we will use two text documents … for our course descriptions. … These are available in the courses subdirectory … in your course examples. … These are descriptions for two courses. … Let's build a word cloud … for the popular words used in these courses. … The code for this chapter … is available in the file code_01_XX Word Cloud.R. … In this video, we will prepare the data … for doing word cloud. … To start, we import the tm package in R … for use in this course. … Now, we create a raw course corpus … by loading the contents of the courses directory … into a VCorpus variable. … Next, we perform a series of cleansing steps. … If you are unfamiliar with these steps, … check out the Processing Text … with R Training on LinkedIn Learning. … We first convert the corpus … into lowercase using the tm_map function. … Then we remove punctuations. … Stopwords removal is done … using the standard stopwords list. … Finally, we convert the corpus into a document term matrix …