Extend a time series with additional dates. This is useful when extending the report dates of a time series to include future dates for nowcasting purposes or to include additional dates for backcasting when using a renewal process as the expectation model.
Usage
enw_extend_date(metaobs, days = 20, direction = c("end", "start"))Arguments
- metaobs
A
data.framewith adatecolumn.- days
Number of days to add to the time series. Defaults to 20.
- direction
Should new dates be added at the beginning or end of the data. Default is "end" with "start" also available.
Value
A data.table with the same columns as metaobs but with
additional rows for each date in the range of date to date + days
(or date - days if direction = "start"). An additional variable
observed is added with a value of FALSE for all new dates and TRUE
for all existing dates.
See also
Preprocessing functions
enw_add_delay(),
enw_add_max_reported(),
enw_add_metaobs_features(),
enw_assign_group(),
enw_complete_dates(),
enw_construct_data(),
enw_delay_filter(),
enw_delay_metadata(),
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
metaobs <- data.frame(date = as.Date("2021-01-01") + 0:4)
enw_extend_date(metaobs, days = 2)
#> date .group observed
#> 1: 2021-01-01 1 TRUE
#> 2: 2021-01-02 1 TRUE
#> 3: 2021-01-03 1 TRUE
#> 4: 2021-01-04 1 TRUE
#> 5: 2021-01-05 1 TRUE
#> 6: 2021-01-06 1 FALSE
#> 7: 2021-01-07 1 FALSE
enw_extend_date(metaobs, days = 2, direction = "start")
#> date .group observed
#> 1: 2020-12-30 1 FALSE
#> 2: 2020-12-31 1 FALSE
#> 3: 2021-01-01 1 TRUE
#> 4: 2021-01-02 1 TRUE
#> 5: 2021-01-03 1 TRUE
#> 6: 2021-01-04 1 TRUE
#> 7: 2021-01-05 1 TRUE