This function is used by coxme. When a random effect is expressed
as a sum of variance terms (matrices), it is important that all of
them have the same row/column order and the same block structure.
This does so, while retaining as much sparsity in the result as
possible.
Usage
bdsmatrix.reconcile(varlist, group)
Arguments
varlist
a list, each element of which is a matrix or bdsmatrix object
group
a vector of dimnames, the target match for matrice's dimnames
Value
a varlist, whose individual elements may have had row/column rearrangment.