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Move secondary_opts to opts.R #570

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72 changes: 0 additions & 72 deletions R/estimate_secondary.R
Original file line number Diff line number Diff line change
Expand Up @@ -233,78 +233,6 @@ estimate_secondary <- function(reports,
return(out)
}

#' Secondary Reports Options
#'
#' @description `r lifecycle::badge("stable")`
#' Returns a list of options defining the secondary model used in
#' [estimate_secondary()]. This model is a combination of a convolution of
#' previously observed primary reports combined with current primary reports
#' (either additive or subtractive). It can optionally be cumulative. See the
#' documentation of `type` for sensible options to cover most use cases and the
#' returned values of [secondary_opts()] for all currently supported options.
#'
#' @param type A character string indicating the type of observation the
#' secondary reports are. Options include:
#'
#' - "incidence": Assumes that secondary reports equal a convolution of
#' previously observed primary reported cases. An example application is deaths
#' from an infectious disease predicted by reported cases of that disease (or
#' estimated infections).
#'
#' - "prevalence": Assumes that secondary reports are cumulative and are
#' defined by currently observed primary reports minus a convolution of
#' secondary reports. An example application is hospital bed usage predicted by
#' hospital admissions.
#'
#' @param ... Overwrite options defined by type. See the returned values for all
#' options that can be passed.
#' @importFrom rlang arg_match
#' @seealso [estimate_secondary()]
#' @return A `<secondary_opts>` object of binary options summarising secondary
#' model used in [estimate_secondary()]. Options returned are `cumulative`
#' (should the secondary report be cumulative), `historic` (should a
#' convolution of primary reported cases be used to predict secondary reported
#' cases), `primary_hist_additive` (should the historic convolution of primary
#' reported cases be additive or subtractive), `current` (should currently
#' observed primary reported cases contribute to current secondary reported
#' cases), `primary_current_additive` (should current primary reported cases be
#' additive or subtractive).
#'
#' @export
#' @author Sam Abbott
#' @examples
#' # incidence model
#' secondary_opts("incidence")
#'
#' # prevalence model
#' secondary_opts("prevalence")
secondary_opts <- function(type = "incidence", ...) {
type <- arg_match(
type,
values = c("incidence", "prevalence")
)
if (type == "incidence") {
data <- list(
cumulative = 0,
historic = 1,
primary_hist_additive = 1,
current = 0,
primary_current_additive = 0
)
} else if (type == "prevalence") {
data <- list(
cumulative = 1,
historic = 1,
primary_hist_additive = 0,
current = 1,
primary_current_additive = 1
)
}
data <- modifyList(data, list(...))
attr(data, "class") <- c("secondary_opts", class(data))
return(data)
}

#' Update estimate_secondary default priors
#'
#' @description `r lifecycle::badge("stable")`
Expand Down
72 changes: 72 additions & 0 deletions R/opts.R
Original file line number Diff line number Diff line change
Expand Up @@ -99,6 +99,78 @@ generation_time_opts <- function(dist = dist_spec(mean = 1), ...,
return(dist)
}

#' Secondary Reports Options
#'
#' @description `r lifecycle::badge("stable")`
#' Returns a list of options defining the secondary model used in
#' [estimate_secondary()]. This model is a combination of a convolution of
#' previously observed primary reports combined with current primary reports
#' (either additive or subtractive). It can optionally be cumulative. See the
#' documentation of `type` for sensible options to cover most use cases and the
#' returned values of [secondary_opts()] for all currently supported options.
#'
#' @param type A character string indicating the type of observation the
#' secondary reports are. Options include:
#'
#' - "incidence": Assumes that secondary reports equal a convolution of
#' previously observed primary reported cases. An example application is deaths
#' from an infectious disease predicted by reported cases of that disease (or
#' estimated infections).
#'
#' - "prevalence": Assumes that secondary reports are cumulative and are
#' defined by currently observed primary reports minus a convolution of
#' secondary reports. An example application is hospital bed usage predicted by
#' hospital admissions.
#'
#' @param ... Overwrite options defined by type. See the returned values for all
#' options that can be passed.
#' @importFrom rlang arg_match
#' @seealso [estimate_secondary()]
#' @return A `<secondary_opts>` object of binary options summarising secondary
#' model used in [estimate_secondary()]. Options returned are `cumulative`
#' (should the secondary report be cumulative), `historic` (should a
#' convolution of primary reported cases be used to predict secondary reported
#' cases), `primary_hist_additive` (should the historic convolution of primary
#' reported cases be additive or subtractive), `current` (should currently
#' observed primary reported cases contribute to current secondary reported
#' cases), `primary_current_additive` (should current primary reported cases be
#' additive or subtractive).
#'
#' @export
#' @author Sam Abbott
#' @examples
#' # incidence model
#' secondary_opts("incidence")
#'
#' # prevalence model
#' secondary_opts("prevalence")
secondary_opts <- function(type = "incidence", ...) {
type <- arg_match(
type,
values = c("incidence", "prevalence")
)
if (type == "incidence") {
data <- list(
cumulative = 0,
historic = 1,
primary_hist_additive = 1,
current = 0,
primary_current_additive = 0
)
} else if (type == "prevalence") {
data <- list(
cumulative = 1,
historic = 1,
primary_hist_additive = 0,
current = 1,
primary_current_additive = 1
)
}
data <- modifyList(data, list(...))
attr(data, "class") <- c("secondary_opts", class(data))
return(data)
}

#' Delay Distribution Options
#'
#' @description `r lifecycle::badge("stable")`
Expand Down
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