surveytidy v0.4.0

New features

Survey-aware transformation functions

Five vector-level transformation functions are now available for converting,
collapsing, and reversing variables inside mutate(). All five propagate value
labels automatically and accept .label and .description arguments to
attach metadata in a single step.

• make_factor() — converts labelled, numeric, character, or factor vectors
  to an R factor. Levels are ordered by the numeric value of each value label.
  Accepts ordered, drop_levels, force, and na.rm to control level
  creation.

• make_dicho() — collapses a multi-level factor to two levels by stripping
  the first word of each label and merging labels that reduce to the same
  stem. Accepts .exclude to keep specific levels as NA, and flip_levels
  to reverse the resulting order.

• make_binary() — converts a dichotomous variable to a 0/1 integer. Thin
  wrapper around make_dicho(); accepts flip_values to control which level
  maps to 1.

• make_rev() — reverses a numeric scale using min + max - x and remaps
  value labels to match. Issues a warning when all values are NA.

• make_flip() — reverses the semantic valence of a variable by reversing the
  label strings while keeping the underlying values unchanged. Requires a
  label argument to document the new meaning.