Sets the time persistance for a node of a dynamic Bayes net (DBN), which is the maximum time it should hold its value before taking on a new one.

persistance is expressed as a string. In many applications it will just be the string "1", but it can be another number, such as "0.25", or the name of a constant node, such as "period", whose current value will be used.

dimension must be 0 with this version of Netica.

It is usually better to first try not setting any node persistances, but rather just link delays, using SetNodeInputDelay_bn. After expanding the net with ExpandNet_bn, if some nodes are not being given new values at a fast enough rate (i.e., they do not appear often enough in the time expansion), giving them a persistance of the desired period time will help. Note that nodes will be repeated at a rate high enough to satisfy both link delays and node persistances, which may mean faster repititions (i.e. shorter periods) than either of these explicitly call for by themselves.