Changes in version 1.8.2                        

Fixed

  - distn.stats(): corrected the Weibull standard deviation formula,
    which was returning variance (b^2 * (...)) instead of SD (b *
    sqrt(...)). The test expectation is also corrected.
  - read.output(): an unsupported end.year type now stops execution
    (logger.severe) instead of silently continuing with a broken value
    (logger.error), matching the existing behaviour for start.year.
  - transformstats(): corrected the LSD-to-SE conversion. The
    denominator was t * sqrt(2 * n), but the correct derivation (LSD = t
    * sqrt(2) * SE) gives t * sqrt(2). The extra sqrt(n) factor made SE
    estimates from LSD-reporting studies appear sqrt(n) times smaller
    than true, over-weighting those observations in meta-analysis.

Changed

  - read.output(): start.year and end.year now default to NULL (read all
    years) instead of NA, and both NULL and NA are accepted as "read all
    years" sentinels (#3987).

Added

  - New function nc_write_varfiles() creates text summaries of the
    variables in all netCDF files in an output directory, writing either
    one file named nc_vars.txt if output_mode = "combined" or a separate
    [filename].nc.var alongside each netCDF if output_mode = "paired"
    (#3611).
  - New function nc_merge_all_sites_by_year() combines many netCDFs into
    one file per year (#3620)
  - New function extract_nc_sda() extracts data from a multi-site netCDF
    created by nc_merge_all_sites_by_year (#3620).
  - Added CH4 and N2O variables to standard_vars

                        Changes in version 1.8.1                        

License change

  - PEcAn.utils is now distributed under the BSD three-clause license
    instead of the NCSA Open Source license.

Changed

  - utility function zero.bounded.density is now exported.
  - Roxygen fixes

                        Changes in version 1.8.0                        

Added

  - Shifted convert.input function from PEcAn.utils to PEcAn.DB with a
    new name convert_inputto remove circular dependency. (#3026;
    @nanu1605)
  - Added a stub function convert.input. (#3026; @nanu1605)
  - Updated unit conversions throughout PEcAn to use the units R package
    instead of the unmaintained udunits2. Note that both units and
    udunits2 interface with the same underlying compiled code, so the
    udunits2 system library is still required. (#2989; @nanu1605)
  - Fixed a bug in ud_convert() where it failed with objects of class
    "difftime" introduced by refactoring to use the units package
    instead of udunits (#3012)

                        Changes in version 1.7.1                        

  - All changes in 1.7.1 and earlier were recorded in a single file for
    all of the PEcAn packages; please see
    https://github.com/PecanProject/pecan/blob/v1.7.1/CHANGELOG.md for
    details.