Dividing data into substrings of length L (called boxes) we can test whether a certain digit is part of the box or not. The chance to find a certain digit [0..9] inside the box is simply wL= 1 - (9/10)L
The Pi-Data was divided into 100 blocks (subregions) of equal amount. We proofed any digit from 0 to 9 to fall into the boxes. Finally, we had 10*100=1000 collecting elements.
Box analysis was produced for box length L=1,2,3,4,5,10.
We give result details for box length L=10 as an example.