Winsorize Continuous Variables

Caps extreme outliers at specified percentiles. Crucially, this function allows for stratified winsorization (e.g., by region) to avoid over-trimming poor/rich areas, and it creates new `_w` suffixed columns to preserve raw data provenance.

Usage

ihs_winsorize(data, vars, by = NULL, probs = c(0.01, 0.99))

Arguments

data

A data.frame

vars

Character vector of column names to winsorize

by

Optional grouping variable name (e.g., "region") for stratified thresholds

probs

Numeric vector of lower and upper quantiles. Default `c(0.01, 0.99)`

Value

A data.frame with new `*_w` columns added.