Rescale (normalize) the weights

Usage

step_rescale(spec, to = c("n", "total"), total = NULL, by = NULL)

Arguments

spec: a weighting_spec.
to: "n" (weights sum to the number of active units, i.e. mean weight 1) or "total" (weights sum to total).
total: numeric. Target sum when to = "total".
by: character. Rescale within these groups (optional). With to = "n", each group sums to its own active count.

Examples

weighting_spec(sample_survey, base_weights = pw) |>
  step_rescale(to = "n") |> prep()
#> 
#> == Weighting specification (weightflow) ==
#> Data    : 467 cases
#> Base wts: pw
#> Steps   :
#>   1. rescale (to n)
#> Status  : estimated (prep)
#> 
#> Stage summary:
#>                 stage n_active sum_wts cv_wts deff_kish n_eff
#>                  base      467    4371  0.236     1.056   442
#>  stage_1_step_rescale      467     467  0.236     1.056   442
#> 
#> deff_kish = 1 + CV^2 (Kish design effect from unequal weighting);
#> n_eff = n_active / deff_kish. Both worsen with each adjustment and
#> improve with trimming.
#>