perturb  R Documentation 
Randomly insert/delete/turn arrows to obtain another network.
perturb(nw,data,prior,degree=size(nw),trylist=vector("list",size(nw)), nocalc=FALSE,timetrace=TRUE)
nw 
an object of class 
data 
a data frame used for learning the network, see

prior 
a list containing parameter priors, generated by

degree 
an integer, which gives the number of attempts to randomly insert/remove/turn an arrow. 
trylist 
a list used internally for reusing learning of nodes,
see 
nocalc 
a logical. If 
timetrace 
a logical. If 
Given the initial network, a new network is constructed by randomly choosing an action: remove, turn, add. After the action is chosen, we choose randomly among all possibilities of that action. If there are no possibilites, the unchanged network is returned.
A list with two elements that may be accessed using
getnetwork
and gettrylist
. The elements are
nw 
an object of class 
trylist 
an updated list used internally for reusing learning
of nodes, see 
Susanne Gammelgaard Bottcher,
Claus Dethlefsen rpackage.deal@gmail.com.
set.seed(200) data(rats) fit < network(rats) fit.prior < jointprior(fit) fit < getnetwork(learn(fit,rats,fit.prior)) fit.new < getnetwork(perturb(fit,rats,fit.prior,degree=10)) data(ksl) ksl.nw < network(ksl) ksl.rand < getnetwork(perturb(ksl.nw,nocalc=TRUE,degree=10)) plot(ksl.rand)
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