November 2017
Beginner to intermediate
366 pages
7h 59m
English
Content preview from R Data Analysis Projects
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Bag-of-words
In bag-of-words representation, every document is represented as a collection of words present in the document, hence the name bag-of-words. The order in which the words occur are not considered in bag of words approach. A good way to organize these bag-of-words is using a matrix representation. Let's say we have 100 documents (also called a corpus). In order to build such a matrix, we first make a list of all the unique words present in those 100 documents. This is called the vocabulary of our text corpus. Say we have 5,000 unique words. Our matrix is now a 100 x 5,000 dimension, where the rows are the document and in the column, we have the words from our vocabulary. Such a matrix is called a document term matrix.
Consider ...
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