You are (probably) trying to undo years of conditioning in APL, which has the misguided "singleton extension": In APL, 2 3 4 + (?n⍴1)⍴5 worked. Singleton extension is undesirable because it complicates the rules for the rank operator.
> It feels wrong to have to do things like this every time I want to use the > result of a previous computation called A . Alternatively, it feels wrong that A is non-scalar as computed. On Sun, Sep 2, 2012 at 6:48 PM, Linda Alvord <lindaalv...@verizon.net>wrote: > I finally think I know what I don't know. I want to turn "table" A into a > scalar (which it happens to look like). > > A > 4 > $A > 1 1 > B=:3 5 7 > A+B > |length error > | A +B > (,A)+B > |length error > | (,A) +B > (,3$A)+B > 7 9 11 > (,($B)$A)+B > 7 9 11 > > It feels wrong to have to do things like this every time I want to use the > result of a previous computation called A . > > Linda > > -----Original Message----- > From: programming-boun...@forums.jsoftware.com > [mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Linda > Alvord > Sent: Saturday, September 01, 2012 7:26 PM > To: programm...@jsoftware.com > Subject: Re: [Jprogramming] Scalar to Vector - Yet again > > I wasn't thinking. A isn't a scalar. I even knew it had shape 1 1 . > > A > 4 > $A > 1 1 > $3 2 > 2 > 2$A > 4 > 4 > 3 2 + ,2$A > 7 6 > > This works! Thanks. > > Linda > > -----Original Message----- > From: programming-boun...@forums.jsoftware.com > [mailto:programming-boun...@forums.jsoftware.com] On Behalf Of km > Sent: Saturday, September 01, 2012 6:10 PM > To: programm...@jsoftware.com > Subject: Re: [Jprogramming] Scalar to Vector - Yet again > > ,4 is a vector > > Sent from my iPad > > > On Sep 1, 2012, at 4:56 PM, "Linda Alvord" <lindaalv...@verizon.net> > wrote: > > > I vow to remember how to do this, and several months later I forget > > and can't find it > > > > anywhere. Is there some way to get to the example from the vocabulary > page? > > Maybe I can remember that. > > > > > > > > A=:1 1$4 > > > > 3 2 + A > > > > |length error > > | 3 2 +A > > > > > > > > Thanks. > > > > > > > > Linda > > > > ---------------------------------------------------------------------- > > 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 > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
