Changes in version 1.2.0 (2018-02-18)                  

Major changes

Functions are partly renamed to leave the '.' mostly for generic
functions

  - function ratio.ds is now called: ratioDT
  - function ratio.append_smalles is now called: ratio_append_smallest
  - function preparation.DT2 is now called: preparationDT2
  - Bug in correction for adhering particles of method 'M1' removed:
    Calculation of Errors is optional for functions 'Error =
    TRUE/FALSE'.

Minor changes

  - at several occasions better testing for correct dimensions of input
    data sets
  - function select.VarsElements has new option 'invert = TRUE/FALSE'.
  - function ratioDT has new option 'id.vars'. If given, the function is
    faster.

                        Changes in version 1.1.1                        

Major changes

  - function ratio.DT1_DT2 is now called: ratio.ds (for "ratio of data
    sets"). ratio.DT1_DT2 is kept as alias for backwards compatibility
  - the data set UpperCrust is used as default DT2_replace now only in
    the function CorrectionAdheringParticles, no longer in the function
    preparation.DT2
  - documentation for ratio.ds is improved

                 Changes in version 1.1.0 (2017-07-18)                  

Major changes

  - function ratio.DT1_DT2: new ratio methods log, ar and cr
  - function ratio.DT1_DT2: new option 'vars.ref' for the ratio_type
    'ar' and 'alr' where the reference element can be provided. If
    'vars.ref' is left empty function still asks interactively for the
    reference element.
  - Description file contains now the info from the ReadMe

Bug fixes

  - bug in CorrectionAdheringParticles: checking of the classes of the
    entries is now working correctly
  - selectVarsElements finds element duplicates on each object
    separately and gives a warning
  - method alr: unnecessary looping replaced by vectored version (much
    faster now)
  - function preparation.DT2: if 'vars' are provided and vars are
    element abbreviations function checks now if all 'vars' are in the
    data sets and if there are more 'vars' than columns it gives a
    warning

                 Changes in version 1.0.0 (2017-06-25)                  

  - Added a NEWS.md file to track changes to the package.