The user is recommended not to use the defaults if successive Histograms will be added or otherwise compared, since the defaults will produce Histograms with different numbers of intervals, depending on the details of the input data sets. To set parameters, use the parameter window. This allows the user to mix defaults (shown as "auto" in the parameter boxes) and user-defined values for the number, width, and beginning of the intervals. The range of values covered by the intervals extends from the beginning value to the end, which is end = beginning + number * width.
When the user sets the range of the intervals by inserting values into
the parameter window for all the parameters, it will be possible for values
in the input data set to fall outside this interval. Therefore, the unit
always adds intervals extending to negative and positive infinity when
the user defines all the parameters. (See the help for the Histogram data
type for an explanation of what these extra intervals mean.) It does this
even if the extra "overflow" intervals are empty for the particular input
data set. This ensures that Histograms produced with a given set of user
parameters are always compatible for the purposes of addition, multiplication,
and so on: they always have exactly the same set of intervals. Use the
units Adder, Multiplier, etc for Histogram arithmetic.