.calc_n_retro_nowcast_times

Calculate the number of retrospective nowcast times that can be used after
aggregating

internal

Nowcasting right-truncated epidemiological data is critical
for timely public health decision-making, as reporting delays can create
misleading impressions of declining trends in recent data. This package
provides nowcasting methods based on using empirical
delay distributions and uncertainty from past performance. It is also designed
to be used as a baseline method for developers of new nowcasting methods.
For more details on the performance of the method(s) in this package applied
to case studies of COVID-19 and norovirus, see our recent paper at
<https://wellcomeopenresearch.org/articles/10-614>. The package supports
standard data frame inputs with reference date, report date, and
count columns, as well as the direct use of reporting triangles, and is
compatible with 'epinowcast' objects. Alongside
an opinionated default workflow, it has a low-level pipe-friendly modular
interface, allowing context-specific workflows. It can accommodate a wide
spectrum of reporting schedules, including mixed patterns of reference and
reporting (daily-weekly, weekly-daily). It also supports sharing delay
distributions and uncertainty estimates between strata,
as well as custom uncertainty models and delay estimation methods.

Kaitlyn Johnson

baselinenowcast

Baseline Nowcasting for Right-Truncated Epidemiological Data

Emily Tyszka

Johannes Bracher

Sebastian Funk

Sam Abbott

Tim Taylor

.calc_n_retro_nowcast_times function

<dl><dt>list_of_obs</dt>
<dd>List of matrices of truncated reporting triangles</dd>
<dt>n_possible_horizons</dt>
<dd>Integer indicating the number of horizons in the
retrospective reporting triangle.</dd>
<dt>ref_time_aggregator</dt>
<dd>Function that operates along the rows (reference
times) of the retrospective point nowcast matrix before it has been
aggregated across columns (delays). Default is <code>identity</code>
which does not aggregate across reference times.</dd></dl>

Arguments

Calculate the number of retrospective nowcast times that can be used after
aggregating — .calc_n_retro_nowcast_times

<dl>

<dt>list_of_obs</dt>
<dd>List of matrices of truncated reporting triangles</dd>


<dt>n_possible_horizons</dt>
<dd>Integer indicating the number of horizons in the
retrospective reporting triangle.</dd>


<dt>ref_time_aggregator</dt>
<dd>Function that operates along the rows (reference
times) of the retrospective point nowcast matrix before it has been
aggregated across columns (delays). Default is <code>identity</code>
which does not aggregate across reference times.</dd>

</dl>

.calc_n_retro_nowcast_times: Calculate the number of retrospective nowcast times that can be used after aggregating

Description

Usage

Value

Arguments