pacmacro_ranges: pacmacro_ranges
In jf15558/FAU.JFS: What the Package Does (One Line, Title Case)

Description Usage Arguments Source References

Function to apply a modification of Pacman trimming to macrofossil data. The function generates a densified occurrence record using the same methods as densify then trim the upper and lower ranges by a user-defined percentage. The full and trimmed ranges are then compared against each other to test if the FAD and the LAD for a taxon form a long tail in its distribution. Multiple tail thresholds can be supplied, but all test to see if the sum of the FAD and LAD which exceeds the trimmed range constitute the threshold proportion of the total range for than taxon, e.g. does the FAD and the LAD outside of the trimmed range comprise a quarter (tail.flag = 0.25) of the taxon range?

pacmacro_ranges(
  x,
  rank = "genus",
  srt = "max_ma",
  end = "min_ma",
  step = 1,
  density = 0.1,
  top = 5,
  bottom = 5,
  tail.flag = 0.35,
  method = c("histogram", "kernel")
)

`x`	A stratigraphic occurrence dataset
`rank`	The column name in x containing the taxon names for which trimmed ranges will be calculated
`srt`	A column name in x denoting the occurrence FADs
`end`	A column name in x denoting the occurrence LADs
`step`	A positive integer specifying the time window size (i.e. the duration represented by each row in the output matrix)
`density`	A positive numeric specifying the step size for densifying records. This should ideally be smaller than step
`top`	The percentage by which the top of the range will be trimmed
`bottom`	The percentage by which the bottom of the range will be trimmed
`tail.flag`	a numeric vector of proportions in the range 0 > x > 1 which will be used to test for long tails
`method`	The method for quantifying occurrence density. By default both histogram and kernel density will be used