Counting whole word/number occurrences with str_count in R

Question

Similar to this case, i would like to count the number of occurrences of multiple words and numbers that occur in a vector of sentences with str_count of the stringr package.

Answer 1

Using sprintf you can add word boundaries:

number_of_keywords_df <- str_count(df, paste(sprintf("\\b%s\\b", keywords), collapse = '|'))
number_of_keywords_df

Which yields

[1] 3 2 2

Answer 2

Try putting word boundaries around your keywords:

keywords <- c("honda","civic","toyota","auris","nissan","skyline","1988","1400","159")
keywords <- paste0("\\b", keywords, "\\b")

In regex lingo, \bhonda\b says to match the isolated word honda. Hence hondas would not match because it has an extra letter at the end.