how can I test a harmonic function

Hi everyone! I am very new in using Matlab, the task is to test if the functions I have are harmonic or not !! I tried but I didn't know how !!! Please any help ! Thank you in advance

Answer 1

[Walter Roberson]

http://math.stackexchange.com/questions/320320/is-it-a-harmonic-function-or-not

http://www.mathpages.com/home/kmath214/kmath214.htm