f.externalLinks {ctrdata} | R Documentation |
Calculate the external references from a study's register record
Description
Trial concept calculated: Calculates the links e.g. to publications or other external files referenced from a study record. Requires loading results-related information for EUCTR. Note that documents stored in registers can be downloaded directly, see ctrLoadQueryIntoDb.
Usage
f.externalLinks(df = NULL)
Arguments
df |
data frame such as from dbGetFieldsIntoDf. If 'NULL', prints fields needed in 'df' for calculating this trial concept, which can be used with dbGetFieldsIntoDf. |
Value
data frame with columns '_id' and new column '.externalLinks' (character).
Examples
# fields needed
f.hasResults()
# apply trial concept when creating data frame
dbc <- nodbi::src_sqlite(
dbname = system.file("extdata", "demo.sqlite", package = "ctrdata"),
collection = "my_trials", flags = RSQLite::SQLITE_RO)
trialsDf <- dbGetFieldsIntoDf(
calculate = "f.externalLinks",
con = dbc)
trialsDf
[Package ctrdata version 1.24.0 Index]