Thanks. I'm beginning to see the connection to frequency distributions. Linda
-----Original Message----- From: programming-boun...@jsoftware.com [mailto:programming-boun...@jsoftware.com] On Behalf Of Raul Miller Sent: Friday, December 09, 2011 1:21 PM To: Programming forum Subject: Re: [Jprogramming] Oblique Road to Success! Here's a breakdown of how I wrote that. First, consider how oblique works: </. i.3 4 +-+---+-----+-----+----+--+ |0|1 4|2 5 8|3 6 9|7 10|11| +-+---+-----+-----+----+--+ It captures diagonals from a matrix. And, also, it's J verb is spelled the same as key -- so it would make sense if they were related. So, what would the key be? This looks promising: (i.3) +/ i.4 0 1 2 3 1 2 3 4 2 3 4 5 So I am going to want to insert a verb between the first two elements of the shape. 3 +/&i. 4 0 1 2 3 1 2 3 4 2 3 4 5 +/&i./ 3 4 0 1 2 3 1 2 3 4 2 3 4 5 Now I just need to ravel them and put the pieces together. Oh, and I also need to merge the first two dimensions of y so that key can work properly: (,+/&i./ 2{. $y) u key ,/y This works, but if I left it like this, I would have to add a comment about how it does not work right when the argument (y) has less than two dimensions. 2 {. $y will fill in 0s for those dimensions, and I want 1s. So I added a couple 1s so that those cases would work right. -- Raul On Fri, Dec 9, 2011 at 12:18 PM, Linda Alvord <lindaalv...@verizon.net> wrote: > Where did you get this. Is there some way that you capture code like this or > do you just write it yourself? > > oblique=:1 :0 > (,+/&i./ 2{.1 1,~$y) u key ,/y > ) > > Thanks in advance. > > Linda > > -----Original Message----- > From: programming-boun...@jsoftware.com > [mailto:programming-boun...@jsoftware.com] On Behalf Of Raul Miller > Sent: Friday, December 09, 2011 11:09 AM > To: Programming forum > Subject: Re: [Jprogramming] Oblique Road to Success! > > On Fri, Dec 9, 2011 at 10:46 AM, Linda Alvord <lindaalv...@verizon.net> wrote: >> b=:5 3 5 >> Either definition has only one argument so isn't the function oblique rather >> than key? So Ric has taken the "Oblique oad To Success!". One wonders if it >> is faster than the other one. > > My previous post about equivalents to /. was confused. > > /.~ uses key > /. without ~ and using only one argument is oblique > > key=:1 :0 > : > (=x) u@#"1 _ y > ) > > oblique=:1 :0 > (,+/&i./ 2{.1 1,~$y) u key ,/y > ) > > FYI, > > -- > Raul > ---------------------------------------------------------------------- > 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
