Watch this Author's files
The kcenters.m file was not included in this submission since it was not written by me. The "Other requirements" section indicates where it may be found (Dueck, Frey: www.psi.toronto.edu/)
Could you please send the kcenters.m and affinprop.m to email@example.com?
The file demo.m also calls on a function affinprop.m (lines 289 and 339) which is not available.
Posted file seems to be missing kcenters.m which gets called on line 47 of demo.m