You may have seen that when running your package code with current r-devel, one gets warnings about
cannot xtfrm data frames
This is because you call order() on a data frame with k rows and 1 column which (currently) returns something of length k.
Now,
? sort says
Sort (or _order_) a vector or factor (partially) into ascending or
descending order. For ordering along more than one variable,
e.g., for sorting data frames, see ‘order’
where in turn ? order says
‘order’ returns a permutation which rearranges its first argument
into ascending or descending order, breaking ties by further
arguments. ‘sort.list’ does the same, using only one argument.
See the examples for how to use these functions to sort data
frames, etc.
and then the examples clearly explain to use do.call() for data frames, ideally also unnaming to avoid name clashes.
Can you please change your package code to no longer call order() on data frames?
no errors, no warnings, no notes
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