Create a named list using specified names or, if names are omitted, using the
names of the objects in the list. The code ]list(a = a, b = b) becomes
nlist(a,b) and list(a = a, b = 2) becomes nlist(a, b = 2),
etc. This is convenient when creating the list of data to pass to Stan.
# NOT RUN {# All variables already definedx <- 1
y <- 2
nlist(x, y)
# Define some variables in the call and take the rest from the environmentnlist(x, y, z = 3)
# }