Network collection

A network collection is a collection or sequence of several networks that belong together, e.g., by building a longitudinal network. You can define a network collection by pressing the collection manager button in visone's toolbar. There must be at leat one node attribute with the proporties of an identifying attribute that is specified in all included networks. If no identifying attribute exists, a network collection cannot be defined. Usually, the node attribute \texttt{id} can serve as identifying attribute, but it is also possible to define another. A network collection is marked as being siena compatible if all included networks contain the same number of nodes. Only network collections that are siena compatible in this sense can be analysed. All operations are performed on the \emph{active} network collection that can be set in the network collection diaglogue.