Is there any practical reason both spdev & ssdev are defined? They both seem to do the same thing (ssdev is a little bit faster). spdev=:+/@(*~ dev) ssdev=:+/@:*:@dev
> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Devon > McCormick > Sent: Wednesday, 27 June 2007 03:54 > To: Programming forum > Subject: Re: [Jprogramming] Correlation Coefficient > > I always like the version that comes in the standard J stats library: > > corr > cov % *&stddev > cov > spdev % <:@[EMAIL PROTECTED] > spdev > +/@(*~ dev) > dev > -"_1 _ mean > mean > +/ % # > stddev > %:@var > var > ssdev % <:@# > ssdev > +/@:*:@dev > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
