# Retrieve and Analyze Clinical Trials in Public Registers

## Documentation for package ‘ctrdata’ version 1.3.1

- DESCRIPTION file.
- User guides, package vignettes and other documentation.

## Help Pages

ctrFindActiveSubstanceSynonyms | Find synonyms of an active substance
ctrGetQueryUrlFromBrowser | Import from clipboard the URL of a search in one of the registers
ctrLoadQueryIntoDb | Retrieve or update information on clinical trials from register and store in database
ctrOpenSearchPagesInBrowser | Open advanced search pages of register(s) or execute search in browser
dbFindFields | Find names of fields in the database collection
dbFindIdsUniqueTrials | Deduplicate records to provide unique clinical trial identifiers
dbGetFieldsIntoDf | Create data frame by extracting specified fields from database collection
dbQueryHistory | Show the history of queries that were loaded into a database
dfListExtractKey | Extract named element(s) from list(s) into long-format data frame
dfMergeTwoVariablesRelevel | Merge two variables into one, optionally map values to new levels
installCygwinWindowsDoInstall | Convenience function to install a minimal cygwin environment under MS Windows, including perl, sed and php