Changes in version 1.4.5.9000                      

                 Changes in version 1.4.5 (2025-11-12)                  

  - No longer uses non-API entry points (@kevinushey, #106).
  - Other various fixes for R CMD check issues.

                 Changes in version 1.4.4 (2020-04-09)                  

  - Fix R CMD check failure in R-devel.

                 Changes in version 1.4.3 (2017-12-11)                  

  - Fix C/C++ problems causing R CMD CHECK errors.

  - melt.data.frame() throws when encountering objects of type POSIXlt,
    and requests a conversion to the (much saner) POSIXct type.

                 Changes in version 1.4.2 (2016-10-22)                  

  - Minor R CMD check fixes for CRAN.

                 Changes in version 1.4.1 (2014-12-06)                  

  - melt.data.frame() now properly sets the OBJECT bit on value variable
    generated if attributes are copied (for example, when multiple
    POSIXct columns are concatenated to generate the value variable)
    (#50)

  - melt.data.frame() can melt data.frames containing list elements as
    id columns. (#49)

  - melt.data.frame() no longer errors when measure.vars is NULL or
    empty. (#46)

                  Changes in version 1.4 (2014-04-23)                   

  - dcast() and acast() gain a useful error message if you use value_var
    intead of value.var (#16), and if value.var doesn't exist (#9). They
    also work better with . in specifications like . ~ . or x + y ~ .

  - melt.array() creates factor variables with levels in the same order
    as the original rownames (#19)

  - melt.data.frame() gains an internal Rcpp / C++ implementation, and
    is now many orders of magnitudes faster. It also preserves identical
    attributes for measure variables, and now throws a warning if they
    are dropped. (Thanks to Kevin Ushey)

  - melt.data.frame() gains a factorsAsStrings argument that controls
    whether factors are converted to character when melted as measure
    variables. This is TRUE by default for backward compatibility.

  - melt.array() gains a as.is argument which can be used to prevent
    dimnames being converted with type.convert()

  - recast() now returns a data frame instead of a list (#45).

                 Changes in version 1.2.2 (2012-12-04)                  

  - Fix incompatibility with plyr 1.8

  - Fix evaluation bug revealed by knitr. (Fixes #18)

  - Fixed a bug in melt where it didn't automatically get variable names
    when used with tables. (Thanks to Winston Chang)

                 Changes in version 1.2.1 (2012-01-10)                  

  - Fix bug in multiple margins revealed by plyr 1.7, but caused by
    mis-use of data frame subsetting.

                  Changes in version 1.2 (2011-11-18)                   

  - Fixed bug in melt where factors were converted to integers, instead
    of to characters

  - When the measured variable is a factor, dcast now converts it to a
    character rather than throwing an error. acast still returns a
    factor matrix. (Thanks to Brian Diggs.)

  - acast is now much faster, due to fixing a very slow way of naming
    the output. (Thanks to José Bartolomei Díaz for the bug report)

  - value_var argument to acast and dcast renamed to value.var to be
    consistent with other argument names

  - Order NA factor levels before (all) when creating margins

  - Corrected reshape citation.

                  Changes in version 1.1 (2011-01-04)                   

  - melt.data.frame no longer turns characters into factors

  - All melt methods gain a na.rm and value.name arguments - these
    previously were only possessed by melt.data.frame (Fixes #5)