Remove unused value labels.

Remove unused value labels of a variable as part of a GADSdat object.

Usage

removeEmptyValLabels(GADSdat, vars, whichValLabels = c("miss", "valid", "all"))

Arguments

GADSdat

GADSdat object imported via eatGADS.

vars

Character string of variable names.

whichValLabels

Should unused missing value tags and labels ("miss"), unused value labels for non-missing values ("valid"), or both ("all") be removed?

Value

Returns the GADSdat object with changed meta data.

Examples

gads <- import_DF(data.frame(v1 = 1))
gads <- changeMissings(gads, varName = "v1", value = c(-99, -98), missings = c("miss", "miss"))
gads <- changeValLabels(gads, varName = "v1", value = c(-99), valLabel = c("not reached"))

gads2 <- removeEmptyValLabels(gads, vars = "v1")