drop.comp.RdDrops arms in a way which preserves connectivity and equally removes data from each treatment in a nodesplit comparison (so as to maximise precision)
drop.comp(ind.df, drops, comp, start = 1)A data frame in long format (one arm per row) from which to drop treatments
A vector of study identifiers from which to drop treatments
A numeric vector of length 2 that contains treatment codes corresponding to the comparison for node-splitting
Can take either 0 or 1 to indicate whether to drop the treatment
in comp[1] (0) or comp[2] (1)