Add a delay variable

Add a delay variable based on the numeric difference between the report_date and reference_date columns.

Usage

enw_add_delay(obs, copy = TRUE)

Arguments

obs

A data.frame containing at least the following variables: reference date (index date of interest), report_date (report date for observations), and confirm (cumulative observations by reference and report date).

copy

Should obs be copied (default) or modified in place?

Value

A data.table with a delay column added.

See also

Preprocessing functions enw_add_max_reported(), enw_add_metaobs_features(), enw_assign_group(), enw_complete_dates(), enw_construct_data(), enw_delay_filter(), enw_delay_metadata(), enw_extend_date(), enw_filter_reference_dates(), enw_filter_report_dates(), enw_latest_data(), enw_metadata(), enw_missing_reference(), enw_preprocess_data(), enw_reporting_triangle_to_long(), enw_reporting_triangle()

Examples

obs <- data.frame(report_date = as.Date("2021-01-01") + -2:0)
obs$reference_date <- as.Date("2021-01-01")
enw_add_delay(obs)
#>    report_date reference_date delay
#> 1:  2020-12-30     2021-01-01    -2
#> 2:  2020-12-31     2021-01-01    -1
#> 3:  2021-01-01     2021-01-01     0