aggregate indicator values into bins or objectives

Usage

aggregate_groups(group_level, group_name, weights = 1, ...)

group_level: Character string for the name of the group level (e.g. "bin" or "objective")
group_name: Character string for the name of the group (e.g. "Biomass Metrics" or "Biodiversity")
weights: numeric vector for the relative weight of each group component
...: group components (e.g. the indicator data.frames in the case of bins)