Method of Categorization - Integer Mode
When you select this method, Statistica will truncate each encountered
value of the selected variable to an integer value, and create one category
(or graph in the case of categorized graphs) for each integer. When you
select this option, the Change Variable
button in this box allows you to select a different variable whose values
will be categorized in the graph. Note that if the number of integer categories
exceeds 1,000, Statistica will automatically change the method of categorization
to Categories (see below) with
16 categories.

In the case of histograms (2D or 3D), the Integer
categorization method offers an additional option designed to automatically
identify the most informative method of categorization if the encountered
distribution of values does not lend itself to a simple integer categorization
(e.g., when it contains fractions or wide ranges of values).
Auto
check box
The specific manner in which this method will categorize the respective
variable depends on whether or not the Auto
check box is set.

In general, if you want to force single integer categories (as described
under the simple Integer Mode
above; e.g., if you want to produce a histogram for 100 different integer
values), deselect the Auto check
box. If you want "neat" categorization, then leave the Auto check box selected.
When you select the Auto option,
Statistica will perform integer categorization as described above, unless
one of the following conditions is met: (1) if the range of values is
greater than 20, or (2) if there are any non-integer values in the respective
variable. In that case, Statistica will create a "neat" categorization
for the histogram. "Neat" categories in this context means that
the program will choose a step size with the only significant digit being
either 1, 2, or 5 (e.g., possible step sizes could be .1, .05, 50, 200,
etc.). The minimum will be chosen (1) so that it includes the smallest
value in the respective variable, and (2) so that it will produce "neat"
scale values, that is, scale values with the last significant digit of
either 0, 2, or 5 (e.g., 10.5, .002, .004, 1000, etc.).