'pi6.txt' is the one-million digit text file
vexp is the expected-value vector
vobservedfreq_7 is the observed frequency vector for the digit '7'
vobservedprop_7 is the observed proportion vector for the digit '7'
dlknorm.m is the Matlab code file for the eponymous function
dpnorm.m ibid
DLKnorm_screenshot shows the results for sample digits 0 and 7. 
DPnorm_screenshot ibid

The code files dpnorm and dlknorm can either be read as text files using a text editor,
or used to generate results in a Matlab environment. If the latter, put both the files and
the pi-file into the same directory and invoke as usual.

The screenshots give samples for '0' and '7'. Other digits give quantitatively similar results.