define_parameter default

[elong0527]

Avoid unnecessary default values for forestly while calling metalite.ae.

The example below is from #20 to show it can properly handle define_parameters with default values.

Please merge #48 before this PR.

devtools::load_all()
library(metalite)

adae_tmp <- forestly_adae 
adae_tmp$AEACN[1:10] <- "DOSE REDUCED"

meta_new <- meta_adam(
  population = forestly_adsl,
  observation = adae_tmp
) |>
  define_plan(plan = metalite::plan(
    analysis = "ae_forestly",
    population = "apat",
    observation = "wk12",
    parameter = "any;ser;reduc"
  )
  ) |>
  define_population(
    name = "apat",
    group = "TRTA",
  ) |>
  define_observation(
    name = "wk12",
    group = "TRTA",
    label = "Weeks 0 to 24"
  ) |>
  define_parameter(
    name = "reduc",
    subset = AEACN == "DOSE REDUCED",
    label = "adverse events resulting in dose reduction"
  ) |>
  define_analysis(
    name = "ae_forestly",
    label = "Interactive forest plot"
  ) |>
  meta_build()

meta_new |>
  prepare_ae_forestly(parameter = "any;ser;reduc") |>
  format_ae_forestly() |>
  ae_forestly()