which_trns: Extract TRN(s) from each element of input

In maia-sh/ctregistries: Data Package and R Functions for Clinical Trial Registries and other MEDLINE Databanks

Extract TRN(s) from each element of input

Description

Extract TRN(s) from each element of input

Usage

which_trns(x)

Arguments

x	A character vector.

Value

A character vector, length of input.

Examples

which_trns(c("NCT00312962", "hello", "euctr2020-001808-42", NA))

df <- dplyr::tibble(trn = c("NCT00312962", "hello", "euctr2020-001808-42", NA))
dplyr::mutate(df, trn_extract = which_trns(trn))

# docDoes not work for multiple TRNs in one element
## Not run: 
which_trns(c("NCT00312962 and euctr2020-001808-41", "hello", "euctr2020-001808-42", NA))

## End(Not run)

maia-sh/ctregistries documentation built on July 20, 2024, 8:08 p.m.