refactor: add data back to fleet

* add data error checks in information
* add get and set id functions to fleet interface and expose in rcpp_interface
* update demo and tests
* add distribution helper functions and tests
* add tests to fleet interface
* Fix formatting for tidyverse style.
* Increase some of the documentation to better explain parameters.
* Share argument documentation across functions.
* Use match.arg().
* use && and ||
* add documentation
* add examples
* add check validity function
* update error message to use cli formatting
* add new tests
* helper function for expected names

DESCRIPTION

@@ -59,6 +59,7 @@ Imports:
     cli,
     dplyr,
     ggplot2,
+    glue,
     jsonlite,
     methods,
     Rcpp,

NAMESPACE

@@ -28,9 +28,13 @@ export(get_log)
 export(get_random)
 export(is.FIMSFit)
 export(is.FIMSFits)
+export(lognormal)
 export(m_agecomp)
 export(m_index)
 export(m_landings)
+export(multinomial)
+export(new_data_distribution)
+export(new_process_distribution)
 export(run_gtest)
 export(setup_and_run_gtest)
 export(setup_gtest)

R/distribution_formulas.R

@@ -0,0 +1,374 @@
+#' Validity checks for distributions
+#'
+#' Check the validity of arguments passed to [new_data_distribution()] and
+#' [new_process_distribution()].
+#'
+#' @param args A list of input arguments.
+#' @noRd
+#' @return
+#' Nothing is returned if the check is successful, and error messages are
+#' returned if the checks are unsuccessful.
+check_distribution_validity <- function(args) {
+  family <- args[["family"]]
+  families <- args[["families"]]
+  sd <- args[["sd"]]
+  if (class(family) !=  "family") {
+    cli::cli_abort(c(
+      "x" = "{.code {family}} is the incorrect type.",
+      "i" = "{.var family} needs to be specified as a family class, e.g.,
+             `family = gaussian()`."
+    ))
+  }
+  if (!(family[["family"]] %in% families)) {
+    fam_name <- family[["family"]]
+    cli::cli_abort(c(
+      "x" = "FIMS currently does not offer the family, {.code {fam_name}}, for
+             this distribution type.",
+      "i" = "The families available for this distribution type are: {.code
+             {families}}."
+    ))
+  }
+  if (!is.null(args[["data_type"]])) {
+    data_type <- args[["data_type"]]
+    data_type_names <- c("index", "agecomp", "lengthcomp")
+
+    if (!(data_type %in% data_type_names)) {
+      cli::cli_abort(c(
+        "x" = "The data type is incorrect.",
+        "i" = "Correct values are: {.code {data_type_names}}."
+      ))
+    }
+
+    if (grepl("comp", data_type) &&
+        (family[["family"]] == "lognormal" ||
+         family[["family"]] == "gaussian")) {
+      fam_name <- family[["family"]]
+      cli::cli_abort(c(
+        "x" = "The family, {.code {fam_name}} is not available for the data
+               type, {.code {data_type}}.",
+        "i" = "The available families for this data type are: `multinomial`."
+      ))
+    }
+    if (data_type == "index" &&
+        family[["family"]] == "multinomial") {
+      fam_name <- family[["family"]]
+      cli::cli_abort(c(
+        "x" = "The family, {.code {fam_name}} is not available for the data
+               type, {.code {data_type}}.",
+        "i" = "The available families for this data type are: `lognormal` or
+               `gaussian`."
+      ))
+    }
+  }
+
+  if (!all(sd[["value"]] > 0)) {
+    sd_value <- sd[["value"]]
+    cli::cli_abort(c(
+      "x" = "At least one value for sd, {.code {sd_value}} is out of bounds.",
+      "i" = "All standard deviation values need to be positive."
+      ))
+  }
+
+  if (length(sd[["estimated"]]) > 1) {
+    if (length(sd[["value"]]) != length(sd[["estimated"]])) {
+      sd_length <- length(sd[["value"]])
+      est_length <- length(sd[["estimated"]])
+      cli::cli_abort(c(
+        "x" = "The length of `sd$value` is {.code {sd_length}} and the length
+               of `sd$estimated` is {.code {est_length}}.",
+        "i" = "The size of `value` and `estimated` must match."
+      ))
+    }
+  }
+}
+
+#' Return name of expected value
+#'
+#' @inheritParams new_data_distribution
+#' @noRd
+#' @return
+#' A string specifying the name of the expected value.
+#'
+get_expected_name <- function(family, data_type) {
+  expected_name <- dplyr::case_when(
+    data_type == "index" && grepl("lognormal|gaussian", family[["family"]]) &&
+      family[["link"]] == "log" ~ "log_expected_index",
+    data_type == "index" && grepl("lognormal|gaussian", family[["family"]]) &&
+      family[["link"]] == "identity" ~ "expected_index",
+    grepl("comp", data_type) ~ "proportion_catch_numbers_at_age"
+  )
+  # Check combination of entries was okay and led to valid name
+  if (is.na(expected_name)) {
+    cli::cli_abort(c(
+      "x" = "Error, expected_name of distribution is {.var {expected_name}}.",
+      "i" = "Some combination of the family and data_type are incompatible."
+    ))
+  }
+  return(expected_name)
+}
+
+#' Set up a new distribution for a data type
+#'
+#' @param module An identifier to a C++ fleet module that is linked to the data
+#'   of interest.
+#' @param family A description of the error distribution and link function to
+#'   be used in the model. The argument takes a family class, e.g.,
+#'   `stats::gaussian(link = "identity")`.
+#' @param sd A list of length two. The first entry, `"value"`, (default = 1)
+#'   stores the initial values (scalar or vector) for the relevant standard
+#'   deviations. The second entry, `"estimated"` (default = FALSE) is a scalar
+#'   or vector of booleans indicating whether or not standard deviation is
+#'   estimated. If `"value"` is a vector and `"estimated"` is a scalar, the
+#'   `"estimated"` value will be applied to the entire vector, otherwise, the
+#'   dimensions of the two must match.
+#' @param data_type A single string specifying the type of data that the
+#'   distribution will be fit to. Options are listed in the function call,
+#'   where the first option listed, i.e., `"index"` is the default.
+#' @return
+#' Reference Class. Use [show()] to view Rcpp class fields, methods, and
+#' documentation.
+#' @export
+#' @examples
+#' \dontrun{
+#' nyears <- 30
+#' # Create a new fleet module
+#' fleet <- methods::new(Fleet)
+#' # Create a distribution for the fleet module
+#' fleet_distribution <- new_data_distribution(
+#'   module = fishing_fleet,
+#'   family = lognormal(link = "log"),
+#'   sd = list(value = rep(sqrt(log(0.01^2 + 1)), nyears),
+#'   estimated = rep(FALSE, nyears),
+#'   data_type = "index"
+#' )
+#' }
+new_data_distribution <- function(
+  module,
+  family,
+  sd = list(value = 1, estimated = FALSE),
+  data_type = c("index", "agecomp", "lengthcomp")
+) {
+  data_type <- match.arg(data_type)
+  families <- c("lognormal", "gaussian", "multinomial")
+
+  # validity check on user input
+  args <- list(
+    family = family,
+    sd = sd,
+    data_type = data_type,
+    families = families
+  )
+  check_distribution_validity(args)
+
+  # assign name of observed data based on data_type
+  obs_id_name <- glue::glue("observed_{data_type}_data_id")
+
+  # Set up distribution based on `family` argument`
+  if (family[["family"]] == "lognormal") {
+    # create new Rcpp module
+    new_module <- new(TMBDlnormDistribution)
+
+    # populate logged standard deviation parameter with log of input
+    new_module$log_logsd <- new(
+      ParameterVector,
+      log(sd$value),
+      length(sd$value)
+    )
+    # setup whether or not sd parameter is estimated
+    if (length(sd$value) > 1 && length(sd$estimated) == 1) {
+      new_module$log_logsd$set_all_estimable(sd$estimated)
+    } else {
+      for (i in 1:seq_along(sd$estimated)) {
+        new_module$log_logsd[i]$estimated <- sd$estimated[i]
+      }
+    }
+  }
+
+  if (family[["family"]] == "gaussian") {
+    # create new Rcpp module
+    new_module <- new(TMBDnormDistribution)
+
+    # populate logged standard deviation parameter with log of input
+    new_module$log_sd <- new(ParameterVector, log(sd$value), length(sd$value))
+
+    # setup whether or not sd parameter is estimated
+    if (length(sd$value) > 1 && length(sd$estimated) == 1) {
+      new_module$log_sd$set_all_estimable(sd$estimated)
+    } else {
+      for (i in 1:seq_along(sd$estimated)) {
+        new_module$log_sd[i]$estimated <- sd$estimated[i]
+      }
+    }
+  }
+
+  if (family[["family"]] == "multinomial") {
+    #create new Rcpp module
+    new_module <- new(TMBDmultinomDistribution)
+  }
+
+  # setup link to observed data
+  if (data_type == "index") {
+    new_module$set_observed_data(module$GetObservedIndexDataID())
+  }
+  if (data_type == "agecomp") {
+    new_module$set_observed_data(module$GetObservedAgeCompDataID())
+  }
+
+  # set name of expected values
+  expected <- get_expected_name(family, data_type)
+  # setup link to expected values
+  new_module$set_distribution_links("data", module$field(expected)$get_id())
+
+  return(new_module)
+}
+
+#' Sets up a new distribution for a process
+#' @inheritParams new_data_distribution
+#' @param par A string specifying the parameter name the distribution applies
+#'   to. Parameters must be members of the specified module. Use
+#'   `methods::show(module)` to obtain names of parameters within the module.
+#' @param is_random_effect A boolean indicating whether or not the process is
+#'   estimated as a random effect.
+#' @seealso
+#' * [new_data_distribution()]
+#' @export
+#' @return
+#' Reference Class. Use `show()` to view Rcpp class fields, methods, and
+#' documentation.
+#' @examples
+#' \dontrun{
+#' # Create a new fleet module
+#' recruitment <- methods::new(BevertonHoltRecruitment)
+#' # view parameter names of the recruitment module
+#' methods::show(BevertonHoltRecruitment)
+#' # Create a distribution for the recruitment module
+#' recruitment_distribution <- new_process_distribution(
+#'   module = recruitment,
+#'   par = "log_devs",
+#'   family = gaussian(),
+#'   sd = list(value = 0.4, estimated = FALSE),
+#'   is_random_effect = FALSE
+#' )
+#' }
+new_process_distribution <- function(module,
+                                     par,
+                                     family,
+                                     sd = list(value = 1, estimated = FALSE),
+                                     is_random_effect = FALSE) {
+  families <- c("lognormal", "gaussian")
+
+  # validity check on user input
+  args <- list(family = family, sd = sd, families = families)
+  check_distribution_validity(args)
+
+  # Set up distribution based on `family` argument`
+  if (family[["family"]] == "lognormal") {
+    # create new Rcpp module
+    new_module <- new(TMBDlnormDistribution)
+
+    # populate logged standard deviation parameter with log of input
+    new_module$log_logsd <- new(
+      ParameterVector,
+      log(sd$value),
+      length(sd$value)
+    )
+    #setup whether or not sd parameter is estimated
+    if (length(sd$value) > 1 && length(sd$estimated) == 1) {
+      new_module$log_logsd$set_all_estimable(sd$estimated)
+    } else {
+      for (i in 1:seq_along(sd$estimated)) {
+        new_module$log_logsd[i]$estimated <- sd$estimated[i]
+      }
+    }
+  }
+
+  if (family[["family"]] == "gaussian") {
+    # create new Rcpp module
+    new_module <- new(TMBDnormDistribution)
+
+    # populate logged standard deviation parameter with log of input
+    new_module$log_sd <- new(ParameterVector, log(sd$value), length(sd$value))
+
+    #setup whether or not sd parameter is estimated
+    if (length(sd$value) > 1 && length(sd$estimated) == 1) {
+      new_module$log_sd$set_all_estimable(sd$estimated)
+    } else {
+      for (i in 1:seq_along(sd$estimated)) {
+        new_module$log_sd[i]$estimated <- sd$estimated[i]
+      }
+    }
+  }
+
+  # indicate whether or not parameter is treated as a random effect in the model
+  module$field(par)$set_all_random(is_random_effect)
+
+  n_dim <- length(module$field(par))
+
+  # create new Rcpp modules
+  new_module$x <- new(ParameterVector, n_dim)
+  new_module$expected_values <- new(ParameterVector, n_dim)
+
+  # initialize values with 0
+  # these are overwritten in the code later by user input
+  for (i in 1:n_dim) {
+    new_module$x[i]$value <- 0
+    new_module$expected_values[i]$value <- 0
+  }
+
+  # setup links to parameter
+  new_module$set_distribution_links(
+    "random_effects",
+    module$field(par)$get_id()
+  )
+
+  return(new_module)
+}
+
+#' Distributions not available in the stats package
+#'
+#' Family objects provide a convenient way to specify the details of the models
+#' used by functions such as [stats::glm()]. These functions within this
+#' package are not available within the stats package but are designed in a
+#' similar manner.
+#'
+#' @param link A string specifying the model link function. For example,
+#'   `"identity"` or `"log"` are appropriate names for the [stats::gaussian()]
+#'   distribution. `"log"` and `"logit"` are the defaults for the lognormal and
+#'   the multinomial, respectively.
+#' @return
+#' An object of class `family` (which has a concise print method). This
+#' particular family has a truncated length compared to other distributions in
+#' [stats::family()].
+#' \item{family}{character: the family name.}
+#' \item{link}{character: the link name.}
+#'
+#'  @seealso
+#' * [stats::family()]
+#' * [stats::gaussian()]
+#' * [stats::glm()]
+#' * [stats::power()]
+#' * [stats::make.link()]
+#' @export
+#' @examples
+#' a_family <- multinomial()
+#' a_family[["family"]]
+#' a_family[["link"]]
+lognormal <- function(link = "log") {
+  family_class <- c(
+    list(family = "lognormal", link = link),
+    stats::make.link(link)
+  )
+  class(family_class) <- "family"
+  return(family_class)
+}
+
+#' @rdname lognormal
+#' @export
+multinomial <- function(link = "logit") {
+  family_class <- c(
+    list(family = "multinomial", link = link),
+    stats::make.link(link)
+  )
+  class(family_class) <- "family"
+  return(family_class)
+}