Reformat Data.frame into a Contact Matrix — reformat_contact

Converts a data.frame of age-band contacts into a numeric matrix for a specified age range.

Usage

reformat_contact_matrix(
  custom_data,
  iso = "custom",
  age_required = 0:100,
  fill_method = "closest",
  value_allocation = "maintain"
)

custom_data: A data.frame with columns: 'age_from', 'age_to', and 'value'.
iso: Character string for area/iso3 if missing. Default is "custom".
age_required: Numeric vector specifying ages to include in matrix rows and columns (default is 0:100).
fill_method: Method for filling values for missing age combinations. Options: 'closest' (default), 'none'.
value_allocation: Currently unused, reserved for future expansion (maintain or split values across age ranges).

Numeric matrix representing contact rates (rows = age_from, columns = age_to).