collapse version 2.0.17

• In GRP.default(), the "group.starts" attribute is always returned, even if there is only one group or every observation is its own group. Thanks @JamesThompsonC (#631).

• Fixed a bug in pivot() if na.rm = TRUE and how = "wider"|"recast" and there are multiple value columns with different missingness patterns. In this case na_omit(values) was applied with default settings to the original (long) value columns, implying potential loss of information. The fix applies na_omit(values, prop = 1), i.e., only removes completely missing rows.

• qDF()/qDT()/qTBL() now allow a length-2 vector of names to row.names.col if X is a named atomic vector, e.g., qDF(fmean(mtcars), c("cars", "mean")) gives the same as pivot(fmean(mtcars, drop = FALSE), names = list("car", "mean")).

• Added a subsection on using internal (ad-hoc) grouping to the collapse for tidyverse users vignette.

• qsu() now adds a WeightSum column giving the sum of (non-zero or missing) weights if the w argument is used. Thanks @mayer79 for suggesting (#650). For panel data (pid) the 'Between' sum of weights is also simply the number of groups, and the 'Within' sum of weights is the 'Overall' sum of weights divided by the number of groups.

• Fixed an inaccuracy in fquantile()/fnth() with weights: As per documentation the target sum is sumwp = (sum(w) - min(w)) * p, however, in practice, the weight of the minimum element of x was used instead of the minimum weight. Since the smallest element in the sample usually has a small weight this was unnoticed for a long while, but thanks to @Jahnic-kb now reported and fixed (#659).

• Fixed a bug in recode_char() when regex = TRUE and the default argument was used. Thanks @alinacherkas for both reporing and fixing (#654).