If a node dialog box is for a continuous node, immediately below the state name edit box will be boxes labeled “Interval” . These are to provide threshold values for the intervals of each state in order to discretize the continuous variable. This method of entering the thresholds is mainly just for touch-up work, or to coordinate the ranges with state names, since usually thresholds are entered using the Multi-Purpose Box.
The box to the left is the lower end of the interval for the current state (inclusive), and the box to the right is the upper end of the interval (exclusive).
To set or change the interval of the current state simply type a number in the appropriate box. States are arranged in a contiguous and (increasing or decreasing) monotonic way, which means that the upper end of one state interval will always be the lower end of interval of the neighboring state. As you type one of these in, Netica will fill in the other as well, so that when you change the current state you will see the number you just entered in one of the Interval boxes.
It is okay if the lower and upper bounds of an interval are the same number, to indicate a point (i.e. zero width interval).
The numbers you enter may be integers, decimal numbers,
scientific notation numbers, “infinity”, or “-infinity”.