Thanks. Equal is element by element. Interesting. I thought there was a section somewhere and youtr reference answered my questions.
A=B 1 1 1 1 1 1 1 1 1 1 1 1 Linda -----Original Message----- From: programming-boun...@forums.jsoftware.com [mailto:programming-boun...@forums.jsoftware.com] On Behalf Of km Sent: Sunday, March 03, 2013 7:15 PM To: programm...@jsoftware.com Subject: Re: [Jprogramming] Hermitian from triangular k Dictionary section II. D. Comparatives directs you to information on comparison tolerance. http://www.jsoftware.com/docs/help701/dictionary/dictd.htm --Kip Murray Sent from my iPad On Mar 3, 2013, at 3:37 PM, "Linda Alvord" <lindaalv...@verizon.net> wrote: > Match worked already so your expression worked, too. > > ((f 3 4)-:g 3 4) > 1 > > A-:*&.+.B > 1 > > However, your expression did what I wanted. > > *&.+.B > 1 0j1 _1 0j_1 > 1 0j1 _1 0j_1 > 1 0j1 _1 0j_1 > > > QuadCT seems to have floated into my memory. As I remember it allows > you to set the precision you want to use to require two arrays to be > considered equal. Is there such a thing in J? > > Linda > > > > -----Original Message----- > From: programming-boun...@forums.jsoftware.com > [mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Brian > Schott > Sent: Sunday, March 03, 2013 7:07 AM > To: programm...@jsoftware.comc > Subject: Re: [Jprogramming] Hermitian from triangular > > Is this what you mean? > A-:*&.+.B > 1 > > > On Sun, Mar 3, 2013 at 4:30 AM, Linda Alvord <lindaalv...@verizon.net> > wrote: >> I was rereading this thread and I remember that in APL there is a >> function that can be applied to B to get A. Is there an equivalent > function in J? >> >> f=: 13 :'^@o.j.0.5*i.y' >> ]A=: f 3 4 >> 1 0j1 _1 0j_1 >> 1 0j1 _1 0j_1 >> 1 0j1 _1 0j_1 >> >> g=: 13 :'([:^o.)j.0.5*i.y' >> B=:g 3 4 >> 1 6.12323e_17j1 _1j1.22465e_16 _1.83697e_16j_1 >> 1j_2.44929e_16 3.06162e_16j1 _1j3.67394e_16 _4.28626e_16j_1 >> 1j_4.89859e_16 5.51091e_16j1 _1j6.12323e_16 _2.44991e_15j_1 >> >> ((f 3 4)-:g 3 4) >> 1 >> >> Linda > > > -- > (B=) > ---------------------------------------------------------------------- > 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
