In the image above, each dot represents a decimal, its position is on a meshgrid and edges are drawn between nearest neighbors that have the same value

First write the digits of number (phi, pi or e) to file

$ python utils/save_number.py -h
$ python utils/save_number.py e 23 23

then run numart with the same arguments

$ python numart.py -h
$ python numart.py e 23 23 1

The digits generated by save_number are safely stored in data/

data/e_23_by_23.dat
data/phi_71_by_71.dat
data/pi_47_by_47.dat

and images are saved in images/

images/e_23_by_23.png
images/phi_71_by_71.png
images/pi_47_by_47.png