Generic function to add columns

Usage

add_var(
  data,
  stcs,
  .var,
  from = detect_from(stcs, .var),
  by = detect_by(stcs, .var, from),
  .filter
)

expand_var_from(data, stcs, .var, from, by, .filter)

new_var_from(data, stcs, .var, from, by, .filter, relationship)

Arguments

data: A data frame with a STCS key (by).
stcs: A list containing the STCS data frame.
.var: chr. The name of variables to add. It can be a named vector (to rename) of length >1.
from: chr. The name of a dataset in the stcs object
by: chr. A named vector used the matching. Argument passed to left_join. names(by) matches variable in data and by matches variable in stcs$from.
.filter: an optional argument which can be use to filter stcs$from before matching.
relationship: chr. Argument passed to left_join.

Value

A data frame with the new column.

Examples

if (FALSE) { # \dontrun{
stcs <- stcs_read("path/to/stcs/dataset/")

data_patientkey(stcs) |>
   add_var(stcs,"sex")

data_patientkey(stcs) |>
  expand_var_from(stcs,"patlongkey",from="patientlongitudinal","patientkey") |>
  add_var(stcs,"bmi")
} # }