21.16 Specific Transformations

We might also have some specific transformations we would like to perform. The examples here may or may not be useful, depending on how we want to analyse the documents. This is really for illustration using the part of the document we are looking at here, rather than suggesting this specific transform adds value.

toString <- content_transformer(function(x, from, to) gsub(from, to, x))
docs <- tm_map(docs, toString, "harbin institute technology", "HIT")
docs <- tm_map(docs, toString, "shenzhen institutes advanced technology", "SIAT")
docs <- tm_map(docs, toString, "chinese academy sciences", "CAS")

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