When results grouping is changed group-specific curves data has to be re-calculated. Normally group curves file is produced by Zonation based on the groupings provided by the user. Same information can almost completely (except for ext-values) be calculated afterwards from the feature-specific curves files.
regroup_curves(x, weights, group.ids)
| x | Data frame of feature specific representation levels. |
|---|---|
| weights | numeric vector for feature specific weights |
| group.ids | numeric vector of new group codes. Number of groups must
match with columns in |
ZGroupCurvesDataFrame with new group statistics.
This function calculates the following stats for Zvariant
object based on a vector of new group IDs:
min:Minimum value of representation on each iteration among features within a group.
mean:Mean value of representation on each iteration among features within a group.
max:Maximum value of representation on each iteration among features within a group.
w.mean:Weighted (based on feature weight) mean value of representation on each iteration among features within a group.
Current implementation does not calculate values for ext2
(extinction risk). Column ext2 is retained in the returned data
frame for compatibility, but column will be populated with NAs.