May be NULL if no weights exist (MCMC or optimization methods).
get_plans_weights(plans)# S3 method for redist_plans
weights(object, ...)
A numeric vector of weights, with an additional attribute
resampled indicating whether the plans have been resampled according
to these weights. If weights have been resampled, this returns the weights
before resampling (i.e., they do not correspond to the resampled plans).
numeric vector
the redist_plans object
Ignored.