View source: R/call-numbers-and-subject.R
get_dewey_decimal_subject_section | R Documentation |
Takes a string representation of a Dewey Decimal call number (DDC) and returns it's subject description. This uses the first three digits of the DDC number and returns the third most general subject classification.
get_dewey_decimal_subject_section(x)
x |
A Dewey Decimal call number |
Returns the most general subject sectionification using the first three digits from the DDC. Returns NA if the DDC looks invalid
get_dewey_decimal_subject_section("709.05") # "History, geographic treatment, biography" get_dewey_decimal_subject_section("823.912") # "English fiction" # vectorized get_dewey_decimal_subject_section(c("709.05", "invalid", NA, "823.912")) # c("History, geographic treatment, biography", NA, NA, # "English fiction")
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