Checks that a survey fulfills all the requirements to work with the 'contact_matrix' function
Arguments
- x
list containing
an element named 'participants', a data frame containing participant information
an element named 'contacts', a data frame containing contact information
(optionally) an element named 'reference, a list containing information information needed to reference the survey, in particular it can contain$a "title", "bibtype", "author", "doi", "publisher", "note", "year"
- id.column
the column in both the
participantsandcontactsdata frames that links contacts to participants- country.column
the column in the
participantsdata frame containing the country in which the participant was queried; if NULL (default), will use "country" column if present- year.column
the column in the
participantsdata frame containing the year in which the participant was queried; if NULL (default), will use "year" column if present