Thanks for the help. The previous question in the paper was:
[quote] Is (? 3 2 $ 10) +"1 2 (i. 3 2 4) a legal expression? What would be the answer if a plain + is used instead? [/quote] So I thought n in the reshape problem would be given as valid number(s) for the rank conjunction. Would there be any n that is valid for rank conjunction but results in an invalid operation for the reshape? On 4/1/06, Roger Hui <[EMAIL PROTECTED]> wrote: > 3 4 5 $"3j4 'abc' > |domain error > | 3 4 5 $"3j4'abc' > > 3 4 5 $"'1' 'abc' > |domain error > | 3 4 5 $"'1''abc' > > 3 4 5 $"1 2 3 4 'abc' > |length error > | 3 4 5 $"1 2 3 4'abc' > > 3 4 5 $"(,.2) 'abc' > |rank error > | 3 4 5 $"(,.2)'abc' > > > > ----- Original Message ----- > From: "June Kim" <[EMAIL PROTECTED]> > To: "Programming forum" <[email protected]> > Sent: Friday, March 31, 2006 11:03 PM > Subject: [Jprogramming] Untying the Gordian Knot: Agreement in J > > Hello > > I have been reading Martin Neitzel's paper on verb ranks from APL > Quote Quad '95. That helped me deepen my understanding on the subject, > though I don't feel completely secure with my understanding yet. > > On section 10 Excercises for Rank, there is a problem answered at the end: > > [quote] > The reshape verb $ has dyadic ranks (1 _). It is no problem to > evaluate 3 2 4 $ 'abc', but try to find some invalid rank > specification n in 3 2 4 $"n 'abc'! > [/quote] > > I couldn't come up with such n that throws an error. Any ideas? > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
