constant function

Collection of REDCap-specific constants

Collection of constants defined by the REDCap developers.

constant(name)

Arguments

• name: Name of constant. Required character.

Returns

The constant's value. Currently all are single integers, but that could be expanded in the future.

Details

Form Completeness

The current constants relate to the 'complete' variable at the end of each form.

• form_incomplete: 0L (i.e., an integer)
• form_unverified: 1L
• form_complete: 2L

Export Rights

See https://your-server/redcap/api/help/?content=exp_users.

• data_export_rights_no_access : 0L
• data_export_rights_deidentified : 1L
• data_export_rights_full : 2L

Form Rights

See https://your-server/redcap/api/help/?content=exp_users. The order of these digits may be unexpected.

• form_rights_no_access : 0L
• form_rights_readonly : 2L
• form_rights_edit_form : 1L
• form_rights_edit_survey : 3L

Access Rights

See https://your-server/redcap/api/help/?content=exp_users.

• access_no : 0L
• access_yes : 1L

To add more, please for and edit constant.R

on GitHub and submit a pull request. For instructions, please see Editing files in another user's repository # nolint in the GitHub documentation.

Examples

REDCapR::constant("form_incomplete")  # Returns 0L
REDCapR::constant("form_unverified")  # Returns 1L
REDCapR::constant("form_complete"  )  # Returns 2L

REDCapR::constant("data_export_rights_no_access"   )  # Returns 0L
REDCapR::constant("data_export_rights_deidentified")  # Returns 1L
REDCapR::constant("data_export_rights_full"        )  # Returns 2L

REDCapR::constant("form_rights_no_access")   # Returns 0L
REDCapR::constant("form_rights_readonly" )   # Returns 2L --Notice the order
REDCapR::constant("form_rights_edit_form")   # Returns 1L
REDCapR::constant("form_rights_edit_survey") # Returns 3L

REDCapR::constant("access_no" )  # Returns 0L
REDCapR::constant("access_yes")  # Returns 1L

REDCapR::constant(c(
  "form_complete",
  "form_complete",
  "form_incomplete"
)) # Returns c(2L, 2L, 0L)
REDCapR::constant(c(
  "form_rights_no_access",
  "form_rights_readonly",
  "form_rights_edit_form",
  "form_rights_edit_survey"
)) # Returns c(0L, 2L, 1L, 3L)

constant_to_form_completion( c(0, 2, 1, 2, NA))
constant_to_form_rights(     c(0, 2, 1, 2, NA))
constant_to_export_rights(   c(0, 2, 1, 3, NA))
constant_to_access(          c(0, 1, 1, 0, NA))

## Not run:

# The following line returns an error:
#     Assertion on 'name' failed: Must be a subset of
#     {'form_complete','form_incomplete','form_unverified'},
#     but is {'bad-name'}.

REDCapR::constant("bad-name")    # Returns an error

REDCapR::constant(c("form_complete", "bad-name")) # Returns an error
## End(Not run)

Author(s)

Will Beasley