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redcapAPI (version 2.7.4)

exportEvents: Export the Events for a Project

Description

Retrieve a data frame giving the users, expiration dates, and data access privileges for each user.

Usage

exportEvents(rcon, ...)

# S3 method for redcapApiConnection exportEvents( rcon, arms = NULL, ..., error_handling = getOption("redcap_error_handling"), config = list(), api_param = list() )

Value

Returns a data frame with six columns

  • event_name The descriptive name of the event.

  • arm_num The arm number in which the event occurs.

  • day_offset The days offset from the first event.

  • offset_min The minimum offset value.

  • offset_max The maximum offset value.

  • unique_event_name A unique event identifying name.

Arguments

rcon

A REDCap connection object as generated by redcapConnection.

...

Arguments to be passed to other methods.

arms

A numeric vector or arm numbers to retrieve. Will also accept a character vector, but will coerce to numeric before processing.

error_handling

An option for how to handle errors returned by the API. see redcap_error

config

list Additional configuration parameters to pass to POST. These are appended to any parameters in rcon$config.

api_param

list Additional API parameters to pass into the body of the API call. This provides users to execute calls with options that may not otherwise be supported by redcapAPI.

REDCap API Documentation

This function allows you to export the events for a project

NOTE: this only works for longitudinal projects.

REDCap Version

5.8.2+

Known REDCap Limitations

None

Author

Benjamin Nutter

Details

It is not sufficient to make the project a longitudinal project. The project must satisfy one of two conditions: 1) have at least two arms and one event defined; or 2) have one arm and at least two events defined. If neither of these conditions are satisfied, the API will return a message such as ERROR: You cannot export arms for classic projects, an error message that isn't as descriptive of the nature of the problem as we might like.

If the project information reports that the project is not longitudinal, a data frame with 0 rows is returned without calling the API.

References

Please refer to your institution's API documentation.

Additional details on API parameters are found on the package wiki at https://github.com/vubiostat/redcapAPI/wiki/REDCap-API-Parameters