PnetFindNode: Finds nodes in a Netica Pnet.
| PnetFindNode | R Documentation |
Finds nodes in a Netica Pnet.
Description
The function PnetFindNode finds a node in a
Pnet with the given name. If no node with the
specified name found, it will return NULL.
The function PnetPnodes returns nodes which have
been marked as pnodes, that is nodes that have “pnodes” in their
PnodeLabels.
Usage
## S4 method for signature 'NeticaBN'
PnetFindNode(net, name)
## S4 method for signature 'NeticaBN'
PnetPnodes(net)
## S4 replacement method for signature 'NeticaBN'
PnetPnodes(net) <- value
Arguments
net |
The |
name |
A character vector giving the name or names of the desired nodes.
Names must follow the |
value |
A list of |
Details
Although each Pnode belongs to a single network, a
network contains many nodes. Within a network, a node is uniquely
identified by its name. However, nodes can be renamed (see
NodeName()).
A NeticaNode is also a Pnode
if it has the label (node set) “pnodes”.
The function PnetPnodes() returns all the Pnodes in the
network, however, the order of the nodes in the network could be
different in different calls to this function.
The form PnetPnodes(net)<-value sets the list of nodes in
value to be the set of Pnodes; removing nodes which are not in
the value from the set of Pndoes.
The Pnodes are not necesarily all of the nodes in the Netica network.
The complete list of ndoes can be found through the
RNetica::NetworkAllNodes function.
Value
The Pnode object or list of Pnode
objects corresponding to names, or a list of all node objects for
PnetPnodes(). In the latter case, the names will be set
to the node names.
Note
NeticaNode objects do not survive the life of a
Netica session (or by implication an R session). So the safest way to
"save" a NeticaNode object is to recreate it using
PnetFindNode() after the network is reloaded.
Author(s)
Russell Almond
References
http://norsys.com/onLineAPIManual/index.html, GetNodeNamed_bn(), GetNetNodes_bn()
See Also
Generic functions:
PnetPnodes(), PnetFindNode(),
Related functions in RNetica package:
NetworkFindNode,
NetworkAllNodes
Examples
sess <- NeticaSession()
startSession(sess)
tnet <- CreateNetwork("TestNet",sess)
nodes <- NewDiscreteNode(tnet,c("A","B","C"))
nodeA <- PnetFindNode(tnet,"A")
stopifnot (nodeA==nodes[[1]])
nodeBC <- PnetFindNode(tnet,c("B","C"))
stopifnot(nodeBC[[1]]==nodes[[2]])
stopifnot(nodeBC[[2]]==nodes[[3]])
allnodes <- PnetPnodes(tnet)
stopifnot(length(allnodes)==0)
## Need to mark nodes a Pnodes before they will be seen.
nodes <- lapply(nodes,as.Pnode)
allnodes <- PnetPnodes(tnet)
stopifnot(length(allnodes)==3)
stopifnot(any(sapply(allnodes,"==",nodeA))) ## NodeA in there somewhere.
DeleteNetwork(tnet)
