Harmonize SPSS-style missing value ranges

Ensure consistency between SPSS-style missing value ranges (`na_range`) and explicit missing values (`na_values`) for labelled survey vectors.

Usage

na_range_to_values(x)

Arguments

x

A labelled vector created with [haven::labelled_spss()] or `retroharmonize_labelled_spss_survey`.

Value

The input vector with harmonized `na_values` and `na_range` attributes. If no harmonization is needed, `x` is returned unchanged.

Details

When both attributes are present, this function:

• adjusts the missing range if it conflicts with existing missing values,

• derives missing values from the range when necessary,

• leaves non-SPSS-labelled vectors unchanged.

This harmonization is important before joining, binding, or summarizing survey data.

See also

[labelled::na_range()], [labelled::na_values()], [as_numeric()]

Other variable label harmonization functions: label_normalize()