enw_filter_delay | R Documentation |
enw_filter_delay(obs, max_delay, timestep = "day")
enw_filter_delay(obs, max_delay, timestep = "day")
obs |
A |
max_delay |
The maximum number of days to model in the delay
distribution. Must be an integer greater than or equal to 1. Observations
with delays larger then the maximum delay will be dropped. If the specified
maximum delay is too short, nowcasts can be biased as important parts of the
true delay distribution are cut off. At the same time, computational cost
scales non-linearly with this setting, so you want the maximum delay to be as
long as necessary, but not much longer. Consider what delays are realistic
for your application, and when in doubt, check if increasing the maximum
delay noticeably changes the delay distribution or nowcasts as estimated by
epinowcast. If it does, your maximum delay may still be too short.
Note that delays are zero indexed and so include the reference date and
|
timestep |
The timestep to used in the process model (i.e. the
reference date model). This can be a string ("day", "week", "month") or a
numeric whole number representing the number of days. If your data does not
have this timestep then you may wish to make use of
|
A data.frame
filtered so that dates by report are less than or
equal the reference date plus the maximum delay.
A data.frame
filtered so that dates by report are less than or
equal the reference date plus the maximum delay.
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_reference_dates()
,
enw_filter_report_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()
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_reference_dates()
,
enw_filter_report_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()
obs <- enw_example("preprocessed")$obs[[1]]
enw_filter_delay(obs, max_delay = 2)
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