a = datestr(now,31)
a = 2016-08-23 09:15:47
a = regexprep(a,'[^a-zA-Z0-9]','') = 20160823091547
a(1:2) = 
a = '160823091547'
Now i need to insert the underscore after the sixth element in the string
how can i do this?
is it possible to optimize the above steps or my approach is correct?
Thanks a lot