If the optimal index for the lambda path is not already assigned, then use a validated method to select the optimal index of the lambda path for alternate criteria (i.e. other than StARS).
get.opt.index(obj, criterion = "gcd", ...)
index of the lambda path
the pulsar/batch.pulsar object to evaluate
a character argument for the desired summary criterion
Ignored
Automated optimal index selection is [currently] only implemented for gcd
(graphlet stability).
Criterion:
gcd: Select the minimum gcd summary score within the lower and upper StARS bounds.
opt.index