Thanks, I see what you mean!!! ts=: 6!:2, 7!:[EMAIL PROTECTED]
ts '# - (1 : ''}.@(u~/\.&.|.)'') i.1000' 0.000193176 17664 ts '# - (1 : ''}.@(u~/\&.|.)'') i.1000' 0.130687 30208 Also, \ does not give the right answer but \. does... I might have done a typing error. On Fri, Sep 26, 2008 at 7:39 PM, Henry Rich <[EMAIL PROTECTED]> wrote: > \. is faster than \ so use > > scan =. 1 : '}.@(u~/\.&.|.)' > > Henry Rich > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Matthew Brand > > Sent: Friday, September 26, 2008 2:33 PM > > To: Programming forum > > Subject: Re: [Jprogramming] scan operator > > > > Thanks for the pointers, here it is: > > scan =. 1 : '}.@: (((u~/)&.|.)\)' > > - scan >: i.5 > > _1 _4 _8 _13 > > (1-2),((1-2)-3),(((1-2)-3)-4),((((1-2)-3)-4)-5) > > _1 _4 _8 _13 > > > > Does this seem like something there ought to be a primitive > > for, I think > > that q might have one? Anyway, it looks like it works so far. > > I want to use > > it to do exponentially weighted moving average EWMA, which > > was a topic on > > the forum earlier in the year. > > > > Cheers, > > Matthew. > > > > On Fri, Sep 26, 2008 at 5:07 PM, Devon McCormick > > <[EMAIL PROTECTED]> wrote: > > > > > Hi Matthew - maybe this is what you want: > > > > > > (1-2)-3 > > > _4 > > > -~/|.1 2 3 > > > _4 > > > ((1-2)-3)-4 > > > _8 > > > -~/|.1 2 3 4 > > > _8 > > > > > > so, you could do "f~/|." > > > > > > On Fri, Sep 26, 2008 at 11:44 AM, Matthew Brand > > <[EMAIL PROTECTED] > > > >wrote: > > > > > > > Hi All, > > > > > > > > If I have a dyadic function f, how can I do the following: > > > > > > > > (((y0 f y1) f y2) f y3... ) f yn > > > > > > > > I want to feed the result of x f y into the next > > evaluation as the left > > > > parameter. > > > > > > > > > > > > Thanks, > > > > Matthew. > > > > > > ---------------------------------------------------------------------- > > > > For information about J forums see > > http://www.jsoftware.com/forums.htm > > > > > > > > > > > > > > > > -- > > > Devon McCormick, CFA > > > ^me^ at acm. > > > org is my > > > preferred e-mail > > > > > ---------------------------------------------------------------------- > > > For information about J forums see > > http://www.jsoftware.com/forums.htm > > > > > ---------------------------------------------------------------------- > > For information about J forums see > > http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
