Changes in version 1.0.3 (2022-07-14)                  

  - Moved package profr and xtable to Suggests. They are optionally used
    to check corr2ds performance and are thus not essential to the
    package.

                        Changes in version 1.0.1                        

  - Moved package rgl to Suggests as the future of OpenGL is uncertain.
    rgl is used as an optional preview in corr2d and is thus not
    essential to the package.

                 Changes in version 1.0.0 (2019-07-29)                  

  - Added publication in Journal of Statistical Software as preferred
    citation. The publication is a good start for newcomers to the field
    of 2D correlation spectroscopy (in R)!

                 Changes in version 0.4.0 (2019-07-01)                  

  - Added internal 'testthat' tests to corr2D to easier check
    correlation results during package development.
  - Added a default print() method for corr2d objects (plot.default()
    for now).
  - Changed plot_corr2d() to use plot() instead of plot.default() to
    enable method dispatch.
  - Fixed a small error with the calculation of reference spectrum 2
    (Ref2) if reference spectrum 1 (Ref1) is not present (Thanks to
    Bettina Gruen).

                 Changes in version 0.3.0 (2018-10-29)                  

  - Added 2T2D correlation analysis to the package. Function uses the
    approach described by I. Noda (2018) <DOI:
    https://doi.org/10.1016/j.molstruc.2018.01.091>.
  - A freshly published paper at The Journal of Statistical Software was
    added as a vignette. This will be updated in the future to also
    include descriptions of new functions.
  - Added citation referencing the published paper at The Journal of
    Statistical Software.

                 Changes in version 0.2.0 (2017-07-17)                  

  - Added 2D codistribution analysis to the packages functions. Function
    uses the approach described by I. Noda (2014) <DOI:
    https://doi.org/10.1016/j.molstruc.2014.01.024>.
  - Rewrote the function plot_corr2d() for better control about the plot
    appearance. Introduced the graphical parameters "lwd", "lwd.axis",
    "lwd.spec", "col", "col.axis", "col.lab", "cex.axis", "cex.lab",
    "cex.leg", "font.axis" and "font.lab" which are/are derived from
    "par". "at.xaxs"/"at.yaxs" and "label.xaxs"/"label.yaxs" allow
    control over the axes ticks and their labels.
    "line.xlab"/"line.ylab" control the position of the axes label.

                 Changes in version 0.1.12 (2016-11-28)                 

  - Rewrote the function plot_corr2d(): The graphical parameters
    specified at "..." are now partly transferred to all parts of the
    plot, not just the main screen.
  - Cleaned up the image.plot() code inside plot_corr2d().
  - Fixed a bug which prevented the use of an individual color palette
    in plot_corr2din3d().
  - Changed the default color palette in plot_corr2din3d() from
    fields::timcolors() to colorspace::diverge_hcl(). This change should
    help to improve the default graphics quality.

                 Changes in version 0.1.11 (2016-10-17)                 

  - Corrected the default value for the normalization factor. It's now
    the number of perturbation variables which is NROW() of Mat1.
  - Added error massages to all functions.
  - Rewrote the function sim2ddata() to allow to set C and Camp NULL. In
    that case only the first order reaction A -> B will be simulated and
    sampled.

                 Changes in version 0.1.10 (2016-07-26)                 

  - Added the function sim2ddata to simulate artificial data.
  - Fixed the plotting of the reference spectra on the 2D correlation
    spectra. Before the reference spectra used an arbitrary x-axis. Now
    they use their correct spectral variables for plotting. 2D
    correlation peaks should now align with their 1D counterparts in the
    reference spectra.
  - Rewrote the interpolation of the perturbation variables to no longer
    use the ineffective cbind in a for loop. Instead apply and sapply
    are now used instead.
  - The interpolated perturbation variables are now saved when the
    perturbation values get interpolated.
  - Cleaned up some left/right confusions in the documentation of
    plot_corr2d.

                 Changes in version 0.1.9 (2016-06-06)                  

  - Package is released on CRAN

Known Bugs

  - A new plot after a call of plot_corr2d() is plotted inside the main
    part. It's a consequence of keeping the split.screen of the main
    part active for interactive data readout and manipulation.