Generic function to calculate the probabilities of each treatment being
at each possible rank and the SUCRAs (Surface Under the Cumulative
RAnking curve) in network meta-analysis.
For more details, look at the following functions to generate
rankograms:
rankogram.netmeta
rankogram.default
References
Salanti G, Ades AE, Ioannidis JP (2011):
Graphical methods and numerical summaries for presenting results
from multiple-treatment meta-analysis: an overview and tutorial.
Journal of Clinical Epidemiology,
64, 163--71