Changes in version 0.3.9
- Added back_period() and base_period(), which are more general than back_price() and base_price().
- Added lehr_index().
- Fixed a rare warning about sqrt() making NaNs in generalized_logmean(-1) when some inputs were close but not equal, despite no NaNs showing in the result.
- The lm_index() and *_agmean_index() functions are now function factories.
Changes in version 0.3.6
- Added the balanced() operator to make it easier to remove NAs with price index functions.
- Added the geks() function for using price-index function (e.g., fisher_index()) to makes a GEKS index.
Changes in version 0.3.4
- Added French translations.
- Made a number of optimizations to make the results of generalized_mean(), extended_mean(), lehmer_mean(), transmute_weights(), and factor_weights() faster in common cases.
- Added the grouped() operator to make all functions work with grouped data.
Changes in version 0.3.1
- Most function names have changed to be less awkward; e.g., mean_generalized() is now generalized_mean(), and contributions_geometric() is now geometric_contributions(). This is unfortunately not backwards compatible, but needed to be done.
- Added the nested_mean() function to calculate nested generalized means for, e.g., the Fisher index.
- The interface for nested_contributions() is now much simpler, and the function is focused on making contributions for Fisher indexes. Added the nested_contributions2() function that implements a different algorithm.
- Added the arithmetic_agmean_index() and geometric_agmean_index() functions to calculate the AG mean index.
- Added some functions for standard outlier-detection methods for price relatives.
- Dropped the 'scale' argument for generalized_mean(), as it really wasn't needed and had the potential to make more problems than it solved.
Changes in version 0.2.5
- Added the back_price() and base_price() functions to make it easier to turn prices stored in a table into price relatives.
- Lots of little improvements to the documentation.
- Simplified the underlying code, resulting in some small performance improvements.
Changes in version 0.2.3
- Added the mean_lehmer() function to calculate the Lehmer mean.
- Added the contributions_nested() function to calculate quote contributions for indexes that are nested generalized means, like the Fisher index.
- Lots of little improvements to the documentation.
Changes in version 0.2.1
- Added a vignette.
- Added the quantity_index() function to turn functions that calculate price indexes into functions that calculate the corresponding quantity index.
- Now works with R >= 3.5.