derive_params_exposure: Add an Aggregated Parameter and Derive the Associated Start...
In epijim/admiral: ADaM in R Asset Library

This function is deprecated. Please use derive_param_exposure() instead.

derive_params_exposure(
  dataset,
  by_vars,
  input_code,
  analysis_var,
  summary_fun,
  filter = NULL,
  set_values_to = NULL
)

`dataset`	Input dataset The variables specified by the `by_vars`,`analysis_var` parameters and `PARAMCD` are expected, Either `ASTDTM` and `AENDTM` or `ASTDT` and `AENDT` are also expected.
`by_vars`	Grouping variables For each group defined by `by_vars` an observation is added to the output dataset. Permitted Values: list of variables
`input_code`	Required parameter code The observations where `PARAMCD` equals the specified value are considered to compute the summary record. Permitted Values: A character of `PARAMCD` value
`analysis_var`	Analysis variable.
`summary_fun`	Function that takes as an input the `analysis_var` and performs the calculation. This can include built-in functions as well as user defined functions, for example `mean` or `function(x) mean(x, na.rm = TRUE)`.
`filter`	Filter condition The specified condition is applied to the input dataset before deriving the new parameter, i.e., only observations fulfilling the condition are taken into account. Permitted Values: a condition
`set_values_to`	Variable-value pairs Set a list of variables to some specified value for the new observation(s) LHS refer to a variable. It is expected that at least `PARAMCD` is defined. RHS refers to the values to set to the variable. This can be a string, a symbol, a numeric value or NA. (e.g. `vars(PARAMCD = "TDOSE",PARCAT1 = "OVERALL")`). More general expression are not allowed. Permitted Values: List of variable-value pairs