The inputs (as you can see from the two sample files) are the factor name, low and high levels. This version assumes integer-valued variables, and automatically does the necessary rounding. One note: we assumed that the "low" and "high" values input by the user are strict bounds. The interval (high-low) is then divided into the appropriate number of bins, and the midpoint of each bin is used (or rounded to the nearest integer). This means that an range of 0-2 with 4 levels will result in a base set of values 0, 1, 1, 2 (i.e., sampling more heavily in the center).