update_stopwords: Update stopword lists with new words.

In mobilizingcs/mobilizr: Functions for the Mobilize Introduction to Data Science course.

Update stopword lists with new words.

Description

An easy way to update stopword lists with new words. Either update preloaded stopwords lists, i.e. "en" or "SMART" or update your own custom stopwords list.

Usage

update_stopwords(words, stopword.set = "en")

Arguments

words	A vector of words, formatted as strings, to add to the 'stopword.set'.
stopword.set	choose a preloaded stopwords list, i.e. "en" (default) or "SMART" or a vector of custom stopwords.

Value

a new list of stopwords

Examples

data("crude")   # Load text data
WordFreqTable(crude, top = 10)    # Notice the top 10 words
crude <- ProcessText(crude, removestopwords = TRUE)   # Remove the "en" stopwords
WordFreqTable(crude, top = 10)    # Notice the new top 10 words
WordsToInclude <- c("said", "mln", "bpd", "dlrs")    # Words we want to include in our stoplist
UpdatedStopwords <- UpdateStopwords(words = WordsToInclude)   # Add words to "en" stoplist
crude <- ProcessText(crude, stopwords.list = UpdatedStopwords, removestopwords = TRUE)
WordFreqTable(crude, top = 10)    # Notice the new top 10 words
## Example using the "SMART" stopword list
data("crude")   # Load text data
WordFreqTable(crude, top = 10)    # Notice the top 10 words
crude <- ProcessText(crude, stopwords.list = stopwords("SMART"), removestopwords = TRUE)   # Remove the "SMART" stopwords
WordFreqTable(crude, top = 10)    # Notice the new top 10 words
WordsToInclude <- c("mln", "bpd", "dlrs")    # Words we want to include in our stoplist
UpdatedStopwords <- UpdateStopwords(words = WordsToInclude, stopword.set = "SMART")   # Add words to "SMART" stoplist
crude <- ProcessText(crude, stopwords.list = UpdatedStopwords, removestopwords = TRUE)
WordFreqTable(crude, top = 10)    # Notice the new top 10 words

mobilizingcs/mobilizr documentation built on Feb. 17, 2024, 7:49 p.m.