NEWS.md

In ksformat: 'SAS'-Style 'PROC FORMAT' for R

ksformat 0.7.1

New features

• fputk() gains a na_as_string argument. When TRUE, an NA in any key component is preserved as the literal string "NA" produced by paste() instead of being restored to NA_character_. This enables round-trip lookups against formats built via fmap(paste(..., sep = "|"), values), where the stored keys themselves contain "NA". Default FALSE preserves existing behavior (NA → .missing / keep_na).
• New finputk() — composite-label wrapper around INVALUE lookup, mirroring fputk() on the reverse direction. Supports the same sep and na_as_string arguments and dispatches on the stored invalue's target_type.

Documentation

• Vignette Example 28: Composite Key Lookup with NA Components — explains why paste()-built keys contain the literal string "NA" for NA inputs, shows the incorrect result with the default na_as_string = FALSE, and demonstrates the correct round-trip with na_as_string = TRUE using a clinical LB PARAMCD derivation scenario.
• Vignette Example 29: Composite Label Invalue Lookup with finputk() — basic two-column reverse lookup and na_as_string = TRUE usage with NA key components.
• examples/CompositeKeyNA.R — runnable companion script for both examples.

ksformat 0.7.0

New features

• New format type stratified_range — combines a discrete stratum (study arm, subject id, composite key, …) with per-stratum numeric / Date / POSIXct range buckets. Apply with fputk(), passing the stratum column(s) first and the value column last.
• New builder fmap_strata(stratum, low, high, label, inc_low, inc_high, sep) — produces a ks_fmap ready for fnew(..., type = "stratified_range"). The chosen separator is carried as an attribute and picked up automatically by fnew().
• New builder fmap_ranges(low, high, label, inc_low, inc_high) — convenience helper that turns parallel vectors of numeric / Date / POSIXct bounds and labels into canonical range keys, removing the need to hand-craft "low,high,inc_low,inc_high" strings.
• fparse() / fexport() support the new type via the VALUE name (stratified_range, range_subtype: numeric|date|datetime, strata_sep: |) block syntax. Both canonical "STRATUM|low,high,inc_low,inc_high" keys and the friendly "STRATUM"|[low, high) interval form are accepted, including per-stratum .missing|STRATUM / .other|STRATUM directives.
• print.ks_format() renders stratified formats grouped under Stratum "X": headers.

Documentation

• Vignette Example 26: Stratified Range Lookup with fputk() — programmatic and text-based construction, date subtype with per-subject windows, per-stratum and global .other fallbacks, and fexport()/fparse() roundtrip.
• Vignette Example 27: Plain Range Lookup with fmap_ranges() — builds a numeric age-band format without hand-crafted canonical keys.
• examples/StratifiedRanges.R — runnable companion script.

ksformat 0.6.7

Documentation

• Added vignette Example 25: Date Range Bucketing covering date_range and datetime_range types: fiscal-year bucketing, fparse() with ISO bounds, LOW/HIGH open-ended arms, fput_all() multilabel overlapping windows, auto-detection, fexport()/fparse() roundtrip, and datetime_range shift bucketing.
• Added examples/DateRanges.R — a self-contained runnable script with the same scenarios for quick interactive exploration.

ksformat 0.6.6

New features

• date_range and datetime_range format types: bucket Date or POSIXct values into character labels using interval bounds written as ISO date/datetime strings. Both types reuse the numeric range-table fast path (sorted-disjoint ranges hit findInterval() in C).
• fnew() accepts type = "date_range" / "datetime_range" and a new optional date_format argument for parsing custom bound strings.
• fparse() accepts interval notation with date/datetime bounds, e.g. [2024-01-01, 2025-01-01) = "FY24" and [2024-01-01 08:00, 2024-01-01 16:00) = "Day". The type is auto-detected when no explicit subtype is given.
• fexport() renders date/datetime range bounds as ISO strings, enabling full roundtrip through fparse().
• Bounds support LOW / HIGH keywords (rendered as -Inf / +Inf and emitted back as LOW / HIGH on export) and exclusive ( / ) brackets.

ksformat 0.6.5

Performance

• Precomputed range table: ks_format objects now carry a pre-built range_table field. Range keys are parsed once at format-creation time (in fnew(), fparse(), fimport()) rather than on every fput() call.
• findInterval() fast path in fput(): sorted, non-overlapping numeric ranges with standard [low, high) semantics now use R's built-in findInterval() (O(n log k) in C), giving a ~10–14× speedup over the previous per-range R loop on large inputs (benchmarked at 1M rows).
• skip_discrete optimisation in fput(): pure numeric-range formats (no discrete keys) with numeric input now skip the as.character() + match() step entirely.
• is_missing(): removed a redundant is.nan() pass on numeric vectors — is.na() already returns TRUE for NaN.

Bug Fixes

• .build_range_table(): ranges defined out-of-order are now sorted by (low, high) before storage, so the findInterval fast path triggers regardless of definition order.
• .build_range_table(): removed a dead attr<- loop that silently had no effect (subsetting a character vector creates a copy, stripping any attribute set on the subset).

ksformat 0.6.4

New Features

• Added franges(): extracts all range entries from a ks_format object as a tidy data.frame with columns low, high, inc_low, inc_high, and label. Accepts either a ks_format object or a registered format name.
• Added fmap_to_ranges(): reverse-looks up range bounds by label — given a vector of coded values that match range labels in a format, returns the corresponding low / high bounds (and inclusivity flags) per element.

ksformat 0.6.3

Bug Fixes

• Fixed fput() (and fputk()) losing the tzone attribute when returning POSIXct values from a value-type format. The result vector was seeded from a tzone-less NA, so values were silently displayed in the local timezone instead of the source timezone (e.g. UTC), causing an apparent time-shift. The tzone attribute of the mapped values is now propagated to the result.

ksformat 0.6.2

New Features

• Added format_library_app() Shiny browser for the global format library, including filters by name/object type, per-object details, and mapping table rendering for both ks_format and ks_invalue entries.
• Added an RStudio addin entry (Format Library Browser) to launch format_library_app() from the Addins menu.

Enhancements

• Replaced plain-text print preview in the app with a formatted mapping table that shows mappings, range rules, and special directives (.missing, .other) in structured form.
• Added app management UX improvements: explicit quit action with confirmation modal, plus confirmations for destructive clear/remove operations.

Documentation

• Added format_library_app() docs and package index references.
• Updated README with interactive browser usage and behavior summary.

ksformat 0.6.1

Documentation

• Cheat sheet updated: added fputk() examples (basic composite key, fmap() data-driven Date lookup, fparse() text-defined Date lookup), added fmap() to the Function Reference table, and rearranged layout to fit landscape page.
• Vignette Example 22 added: "Date Lookup via fparse() and fputk()" — character lookup, native Date lookup with fmap(), and round-trip via fexport()/fparse().

ksformat 0.6.0

Breaking Changes

• fnew() no longer accepts the reverse parameter. Use fmap(keys, values) instead of setNames(values, keys) with reverse = FALSE to create data-driven formats consistently for all types.

New Features

• New fmap(keys, values) helper creates a key-value mapping that tells fnew() to use the natural direction (keys → values) without reversal. Works identically for character, numeric, Date, POSIXct, and logical formats.

Documentation

• Vignette Example 21 rewritten: "Consistent Data-Driven Formats with fmap()" — demonstrates how fmap(keys, values) replaces the old setNames() + reverse = FALSE pattern.
• Updated Example 20 (Composite Key Lookup) to use fmap().

ksformat 0.5.1

Bug Fixes

• Fixed Example 20 (Composite Key Lookup) in vignette: added missing reverse = FALSE to the character format created with setNames(), which caused all lookups to return "NOT FOUND".

ksformat 0.5.0

New Features

• fnew() gains a reverse parameter for explicit control over named-vector direction. Set reverse = FALSE to use the natural setNames(values, keys) convention consistently for all format types — character, numeric, Date, POSIXct, and logical. The default (NULL) preserves backward-compatible auto-detection: reversal for character/numeric, no reversal for value types.

Documentation

• New vignette Example 21: "Consistent Data-Driven Formats with reverse" — demonstrates how to build lookup formats from data frames using the same setNames() pattern for all output types.
• Updated fnew() documentation with detailed explanation of the named-vector reversal convention and the new reverse parameter.

ksformat documentation built on May 21, 2026, 9:07 a.m.