Node Type
To be able to use nodes as arguments in expression functions, node types are
introduced for discrete chance nodes and decision nodes. Below are
listed the different node types:
- Labelled - Each state has a label. This is similar how all
discrete nodes looked in old versions of Hugin.
- Boolean - Has two states: false and true.
- Numbered - Each state has a numeric value. This means that you can
make expressions define the sum of two numbered nodes. You can also
specify standard discrete distribution functions for numbered nodes if
you fit the state values to what is required for the distribution
function (typically: 0, 1, 2,...).
- Interval - Each state represents an interval on the real
axis. The entire set of states span a continuous interval on the real
axis. This is used to approximate a continuous random variable. You
can specify standard continuous distribution functions for interval nodes, or
you can use them in arithmetic functions.
You specify the node type of a node by activating the node so that it
is shown in the node edit pane. Then,
select the node type from the node type drop down box in the top of
the node edit pane. You can also select
the node type in the Node tab of the Node
Properties dialog.
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