Ok, thanks! I got it now. Esa
-------- Original message -------- From: 'Mike Day' via Programming <[email protected]> Date: 2/12/17 13:01 (GMT+02:00) To: [email protected] Subject: Re: [Jprogramming] Hooked again It looks to me as if the two left hooks form one big left hook, not that I'm into boxing: mn =: -"1 mean mp1=: mp~|: ((mp1 mn)%#)data NB. big "hook" 504 360 180 360 360 0 180 0 720 ((mp1 @: mn)%#)data NB. mp1 after mn using @: 504 360 180 360 360 0 180 0 720 (([: mp1 mn)%#)data NB. mp1 after mn using [: 504 360 180 360 360 0 180 0 720 Any use? Mike On 12/02/2017 08:06, Lippu Esa wrote: > ]data=. 5 3 $ 90 60 90 90 90 30 60 60 60 60 60 90 30 30 30 > > mean=: +/%# > mp=: +/ . * > covmat=: ((mp~|:)(-"1 mean))%# NB. divede by n not n-1 to comply with the > example --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
