Approximate Sampling a Distribution using Counts — sample_approx

Deprecated; Convolves cases by a PMF function.

Usage

sample_approx_dist(
  cases = NULL,
  dist_fn = NULL,
  max_value = 120,
  earliest_allowed_mapped = NULL,
  direction = "backwards",
  type = "sample",
  truncate_future = TRUE
)

Arguments

cases: A <data.frame> of cases (in date order) with the following variables: date and cases.
dist_fn: Function that takes two arguments with the first being numeric and the second being logical (and defined as dist). Should return the probability density or a sample from the defined distribution. See the examples for more.
max_value: Numeric, maximum value to allow. Defaults to 120 days
earliest_allowed_mapped: A character string representing a date ("2020-01-01"). Indicates the earliest allowed mapped value.
direction: Character string, defato "backwards". Direction in which to map cases. Supports either "backwards" or "forwards".
type: Character string indicating the method to use to transform counts. Supports either "sample" which approximates sampling or "median" would shift by the median of the distribution.
truncate_future: Logical, should cases be truncated if they occur after the first date reported in the data. Defaults to TRUE.

Value

A <data.table> of cases by date of onset