udpipe (version 0.8.3)

unique_identifier: Create a unique identifier for each combination of fields in a data frame

Description

Create a unique identifier for each combination of fields in a data frame. This unique identifier is unique for each combination of the elements of the fields. The generated identifier is like a primary key or a secondary key on a table. This is just a small wrapper around frank

Usage

unique_identifier(x, fields, start_from = 1L)

Arguments

x

a data.frame

fields

a character vector of columns from x

start_from

integer number indicating to start from that number onwards

Value

an integer vector of the same length as the number of rows in x containing the unique identifier

Examples

# NOT RUN {
data(brussels_reviews_anno)
x <- brussels_reviews_anno
x$doc_sent_id <- unique_identifier(x, fields = c("doc_id", "sentence_id"))
head(x, 15)
range(x$doc_sent_id)
x$doc_sent_id <- unique_identifier(x, fields = c("doc_id", "sentence_id"), start_from = 10)
head(x, 15)
range(x$doc_sent_id)
# }