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Filter by report dates

Source: R/preprocess.R
enw_filter_report_dates.Rd

This is a helper function which allows users to create truncated data sets at past time points from a given larger data set. This is useful when evaluating nowcast performance against fully observed data. Users may wish to combine this function with enw_filter_reference_dates().

Usage

enw_filter_report_dates(obs, latest_date, remove_days)

Arguments

obs

A data.frame; must have report_date and reference_date columns.

latest_date

Date, the latest report date to include in the returned dataset.

remove_days

Integer, if latest_date is not given, the number of report dates to remove, starting from the latest date included.

Value

A data.table filtered by report date

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_extend_date(), enw_filter_delay(), enw_filter_reference_dates(), enw_flag_observed_observations(), enw_impute_na_observations(), enw_latest_data(), enw_metadata(), enw_metadata_delay(), enw_missing_reference(), enw_preprocess_data(), enw_reporting_triangle(), enw_reporting_triangle_to_long()

Examples

# Filter by date
enw_filter_report_dates(germany_covid19_hosp, latest_date = "2021-09-01")
#>          reference_date location age_group confirm report_date
#>                  <IDat>   <fctr>    <fctr>   <int>      <IDat>
#>       1:     2021-04-06       DE       00+     149  2021-04-06
#>       2:     2021-04-07       DE       00+     312  2021-04-07
#>       3:     2021-04-08       DE       00+     424  2021-04-08
#>       4:     2021-04-09       DE       00+     288  2021-04-09
#>       5:     2021-04-10       DE       00+     273  2021-04-10
#>      ---                                                      
#> 1058739:     2021-06-08    DE-TH       80+       4  2021-08-28
#> 1058740:     2021-06-09    DE-TH       80+       4  2021-08-29
#> 1058741:     2021-06-10    DE-TH       80+       1  2021-08-30
#> 1058742:     2021-06-11    DE-TH       80+       0  2021-08-31
#> 1058743:     2021-06-12    DE-TH       80+       2  2021-09-01

# Filter by days
enw_filter_report_dates(germany_covid19_hosp, remove_days = 10)
#>          reference_date location age_group confirm report_date
#>                  <IDat>   <fctr>    <fctr>   <int>      <IDat>
#>       1:     2021-04-06       DE       00+     149  2021-04-06
#>       2:     2021-04-07       DE       00+     312  2021-04-07
#>       3:     2021-04-08       DE       00+     424  2021-04-08
#>       4:     2021-04-09       DE       00+     288  2021-04-09
#>       5:     2021-04-10       DE       00+     273  2021-04-10
#>      ---                                                      
#> 1439301:     2021-07-17    DE-TH       80+       1  2021-10-06
#> 1439302:     2021-07-18    DE-TH       80+       0  2021-10-07
#> 1439303:     2021-07-19    DE-TH       80+       0  2021-10-08
#> 1439304:     2021-07-20    DE-TH       80+       0  2021-10-09
#> 1439305:     2021-07-21    DE-TH       80+       0  2021-10-10