rClinicalCodes (version 1.0.1)

codelist_keywords: Extract keywords from clinical code lists

Description

This function takes a dataframe of clinical codes and gives a vector of keywords, sorted by frequency

Usage

codelist_keywords(codelist, keyword_column = "description", extra_stopwords = NULL)

Arguments

codelist

a dataframe of clinical codes, such as downloaded using the get_ClinicalCodes function

keyword_column

The column of the dataframe to extract keywords from

extra_stopwords

an optional character vector of further stopwords to remove

Value

character vector of keywords, sorted by frequency in the list

Details

All terms are converted to lower case. Common stopwords, whitespace and punctuation are removed Optional extra_stopwords vector

Examples

## Not run: 
# # Get codelist from url:
# angina_codes <- get_ClinicalCodes(
# url = "https://clinicalcodes.rss.mhs.man.ac.uk/medcodes/article/6/codelist/angina/download/")
# codelist_keywords(angina_codes, extra_stopwords = c("good", "poor", "[x]"))
# ## End(Not run)