Hi Not direct link to paper. The DOI is: DOI:10.1112/S0025579300013176 If you are interested, I have a copy in pdf. Send me a email to mikelpater at hotmail dot es. Thanks, Mikel
> From: [email protected] > Subject: Programming Digest, Vol 73, Issue 8 > To: [email protected] > Date: Wed, 5 Oct 2011 22:28:18 +0800 > > Send Programming mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://jsoftware.com/cgi-bin/mailman/listinfo/programming > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Programming digest..." > > > Today's Topics: > > 1. Fractal Series - Moran Fractals (mikel paternain) > 2. Re: Fractal Series - Moran Fractals (Wim de Lange) > 3. Tacit vs. Explicit (Gian Medri) > 4. Re: Tacit vs. Explicit (Henry Rich) > 5. Re: Fractal Series - Moran Fractals (R.E. Boss) > 6. Re: Tacit vs. Explicit (Bo Jacoby) > 7. Re: Tacit vs. Explicit (Viktor Cerovski) > 8. Re: Tacit vs. Explicit (Raul Miller) > 9. Re: Tacit vs. Explicit (Bo Jacoby) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 5 Oct 2011 10:31:19 +0200 > From: mikel paternain <[email protected]> > Subject: [Jprogramming] Fractal Series - Moran Fractals > To: <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > > Hi. > The question is how implement in J a fractals serie (Moran fractal) The > reference paper is: > > Fractal Series. > M. Mor?n > Mathematica 36 (1989) 334,348. > > I have a copy of this paper if you are interested. > > Thanks in advance, > > Mikel > mikel at hotmail dot es > > ------------------------------ > > Message: 2 > Date: Wed, 5 Oct 2011 10:39:54 +0200 > From: Wim de Lange <[email protected]> > Subject: Re: [Jprogramming] Fractal Series - Moran Fractals > To: Programming forum <[email protected]> > Message-ID: > <CAKDx0LTY6cV4=vtpkobzoqrhumxxmlf5_ayhhbml_v5iwyc...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Do you have a link to this paper? > > Groetjes, > Wim > > > 2011/10/5 mikel paternain <[email protected]> > > > > > Hi. > > The question is how implement in J a fractals serie (Moran fractal) The > > reference paper is: > > > > Fractal Series. > > M. Mor?n > > Mathematica 36 (1989) 334,348. > > > > I have a copy of this paper if you are interested. > > > > Thanks in advance, > > > > Mikel > > mikel at hotmail dot es > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > > > ------------------------------ > > Message: 3 > Date: Wed, 5 Oct 2011 11:19:54 +0200 > From: Gian Medri <[email protected]> > Subject: [Jprogramming] Tacit vs. Explicit > To: [email protected] > Message-ID: > <CAHozpxVwGuJOXao0v1dfN-B=-VwX=wbukntgpks2_rieuve...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Hi! > I have a function: > bestfit=:(],0{&<.&<.0.5+(1+0.01*(?30)-15)*(((+/ % #)*1+#)-(+/))) > that calculates the n+1 element. > bestfit 90 90 90 > 90 90 90 81 > The tacit form doesn't work properly, because the "?" is not active every > time I call bestfit 90 90 90. > When I use > (],0{&<.&<.0.5+(1+0.01*(?50)-25)*(((+/ % #)*1+#)-(+/))) 90 90 90 > then the function works properly. > > My question is if it is possible to have a tacit verb with the "?" active. > > Thanks > > Gian Medri > > > ------------------------------ > > Message: 4 > Date: Wed, 05 Oct 2011 05:25:22 -0400 > From: Henry Rich <[email protected]> > Subject: Re: [Jprogramming] Tacit vs. Explicit > To: Programming forum <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > bestfit=:(],0{&<.&<.0.5+(1+0.01*_15+(?@(30"_)))*(((+/ % #)*1+#)-(+/))) > bestfit 90 90 90 > 90 90 90 101 > bestfit 90 90 90 > 90 90 90 102 > bestfit 90 90 90 > 90 90 90 103 > bestfit 90 90 90 > 90 90 90 78 > > Henry Rich > > On 10/5/2011 5:19 AM, Gian Medri wrote: > > Hi! > > I have a function: > > bestfit=:(],0{&<.&<.0.5+(1+0.01*(?30)-15)*(((+/ % #)*1+#)-(+/))) > > that calculates the n+1 element. > > bestfit 90 90 90 > > 90 90 90 81 > > The tacit form doesn't work properly, because the "?" is not active every > > time I call bestfit 90 90 90. > > When I use > > (],0{&<.&<.0.5+(1+0.01*(?50)-25)*(((+/ % #)*1+#)-(+/))) 90 90 90 > > then the function works properly. > > > > My question is if it is possible to have a tacit verb with the "?" active. > > > > Thanks > > > > Gian Medri > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > > > ------------------------------ > > Message: 5 > Date: Wed, 5 Oct 2011 13:31:32 +0200 > From: "R.E. Boss" <[email protected]> > Subject: Re: [Jprogramming] Fractal Series - Moran Fractals > To: "'Programming forum'" <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > I (also) sent you a copy. > > > R.E. Boss > > > -----Oorspronkelijk bericht----- > Van: [email protected] > [mailto:[email protected]] Namens Wim de Lange > Verzonden: woensdag 5 oktober 2011 10:40 > Aan: Programming forum > Onderwerp: Re: [Jprogramming] Fractal Series - Moran Fractals > > Do you have a link to this paper? > > Groetjes, > Wim > > > 2011/10/5 mikel paternain <[email protected]> > > > > > Hi. > > The question is how implement in J a fractals serie (Moran fractal) The > > reference paper is: > > > > Fractal Series. > > M. Mor?n > > Mathematica 36 (1989) 334,348. > > > > I have a copy of this paper if you are interested. > > > > Thanks in advance, > > > > Mikel > > mikel at hotmail dot es > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > > > > ------------------------------ > > Message: 6 > Date: Wed, 5 Oct 2011 12:37:41 +0100 (BST) > From: Bo Jacoby <[email protected]> > Subject: Re: [Jprogramming] Tacit vs. Explicit > To: Programming forum <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset=iso-8859-1 > > Hi Gian! > > The mean value of ?30 is not 15 but 14.5. > > ?? (+/%#)i.30 > 14.5 > > > Is there a point in using <.&<. rather than <.? ? > > Note that (((+/ % #)*1+#)-(+/))) is equal to (+/ % #) > > When you apply a multiplicative noise, you should multiply by ^noise? rather > than 1+noise.? > > So your bestfit calculation may look somewhat like this: > > > ?? (],0{&<.0.5+(([:^0.01*_14.5+[:? 30"_)* +/ % #))90 90 90 > 90 90 90 92 > - Bo > > > >________________________________ > >Fra: Henry Rich <[email protected]> > >Til: Programming forum <[email protected]> > >Sendt: 11:25 onsdag den 5. oktober 2011 > >Emne: Re: [Jprogramming] Tacit vs. Explicit > > > >bestfit=:(],0{&<.&<.0.5+(1+0.01*_15+(?@(30"_)))*(((+/ % #)*1+#)-(+/))) > >? ? bestfit 90 90 90 > >90 90 90 101 > >? ? bestfit 90 90 90 > >90 90 90 102 > >? ? bestfit 90 90 90 > >90 90 90 103 > >? ? bestfit 90 90 90 > >90 90 90 78 > > > >Henry Rich > > > >On 10/5/2011 5:19 AM, Gian Medri wrote: > >> Hi! > >>? I have a function: > >> bestfit=:(],0{&<.&<.0.5+(1+0.01*(?30)-15)*(((+/ % #)*1+#)-(+/))) > >> that calculates the n+1 element. > >> bestfit 90 90 90 > >> 90 90 90 81 > >> The tacit form doesn't work properly, because the "?" is not active every > >> time I call bestfit 90 90 90. > >> When I use > >> (],0{&<.&<.0.5+(1+0.01*(?50)-25)*(((+/ % #)*1+#)-(+/))) 90 90 90 > >>? then the function works properly. > >> > >> My question is if it is possible to have a tacit verb with the "?" active. > >> > >> Thanks > >> > >> Gian Medri > >> ---------------------------------------------------------------------- > >> For information about J forums see http://www.jsoftware.com/forums.htm > >> > >---------------------------------------------------------------------- > >For information about J forums see http://www.jsoftware.com/forums.htm > > > > > > > > ------------------------------ > > Message: 7 > Date: Wed, 5 Oct 2011 05:19:32 -0700 (PDT) > From: Viktor Cerovski <[email protected]> > Subject: Re: [Jprogramming] Tacit vs. Explicit > To: [email protected] > Message-ID: <[email protected]> > Content-Type: text/plain; charset=us-ascii > > > > Gian Medri wrote: > > > > Hi! > > I have a function: > > bestfit=:(],0{&<.&<.0.5+(1+0.01*(?30)-15)*(((+/ % #)*1+#)-(+/))) > > that calculates the n+1 element. > > bestfit 90 90 90 > > 90 90 90 81 > > The tacit form doesn't work properly, because the "?" is not active every > > time I call bestfit 90 90 90. > > When I use > > (],0{&<.&<.0.5+(1+0.01*(?50)-25)*(((+/ % #)*1+#)-(+/))) 90 90 90 > > then the function works properly. > > > > My question is if it is possible to have a tacit verb with the "?" active. > > > > Thanks > > > > Gian Medri > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > > > In J, when you write (f x) in your tacit code definition, J replaces (f x) > with its value. That's fine as long as verb f is a function, > but since verb ? is not a function, every appearance of (? x) will give > you a different value. > > Simply said, (>:30) in your code would mean: put 31 here, while > (?30) means: put a random number between 0 and 29 here. > > Henry's solution to this is to replace (?@30) with (?@(30"_)). > How does this work? > > x"_ is a constant function that returns x for any argument(s) given. > > Now let's consider the following simple equation: > > f@(x"_) y === f x > > Is it true? Yes, if f is a function, for any noun y and x in the domain > of f . Verb ?, however, is not a function, so the Eq. breaks down. > Let's try some examples: > > verb =: >:@(30"_) > verb 0 > 31 > verb 0 > 31 > verb 1 > 31 > > It gives us 31 every time as expected according to the Eq. > Now let's try verb ? : > > verb =: ?@(30"_) > verb 1 > 0 > verb 1 > 8 > verb 0 > 6 > verb 0 > 16 > > Output looks random alright. The problem solved, > another one exposed. > > > -- > View this message in context: > http://old.nabble.com/Tacit-vs.-Explicit-tp32595211s24193p32595276.html > Sent from the J Programming mailing list archive at Nabble.com. > > > > ------------------------------ > > Message: 8 > Date: Wed, 5 Oct 2011 08:58:44 -0400 > From: Raul Miller <[email protected]> > Subject: Re: [Jprogramming] Tacit vs. Explicit > To: Programming forum <[email protected]> > Message-ID: > <CAD2jOU_L_w3qjfCJ3eEE=Q3ytr-HJP3q8rMu5CgeOwYgvu5=c...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > On Wed, Oct 5, 2011 at 8:19 AM, Viktor Cerovski > <[email protected]> wrote: > > Henry's solution to this is to replace (?@30) with (?@(30"_)). > > Note also that J defines the word bind to accomplish this: > ? bind 30 > > -- > Raul > > > ------------------------------ > > Message: 9 > Date: Wed, 5 Oct 2011 15:27:54 +0100 (BST) > From: Bo Jacoby <[email protected]> > Subject: Re: [Jprogramming] Tacit vs. Explicit > To: Programming forum <[email protected]> > Message-ID: > <[email protected]> > Content-Type: text/plain; charset=iso-8859-1 > > PS. a minor estension to my previous mail. > > > >Hi Gian! > >The mean value of ?30 is not 15 but 14.5. > > > >?? (+/%#)i.30 > >14.5 > > > >Is there a point in using <.&<. rather than <.? ? > > > >Note that (((+/ % #)*1+#)-(+/))) is equal to (+/ % #) > > > >When you apply a multiplicative noise, you should multiply by ^noise? rather > >than 1+noise.? > > > >PS.???? Also note that the hook (] g h) is equal to the fork (g h). > >PS.??? Note that? 0{ is superfluous. > > > >So your bestfit calculation may look somewhat like this: > > > >?? (,[:<.0.5+([:^0.01*_14.5+[:? 30"_)* +/ % #)90 90 90 > >90 90 90 96 > > > >- Bo > > > > > >>________________________________ > >>Fra: Henry Rich <[email protected]> > >>Til: Programming forum <[email protected]> > >>Sendt: 11:25 onsdag den 5. oktober 2011 > >>Emne: Re: [Jprogramming] Tacit vs. Explicit > >> > >>bestfit=:(],0{&<.&<.0.5+(1+0.01*_15+(?@(30"_)))*(((+/ % #)*1+#)-(+/))) > >>? ? bestfit 90 90 90 > >>90 90 90 101 > >>? ? bestfit 90 90 90 > >>90 90 90 102 > >>? ? bestfit 90 90 90 > >>90 90 90 103 > >>? ? bestfit 90 90 90 > >>90 90 90 78 > >> > >>Henry Rich > >> > >>On 10/5/2011 5:19 AM, Gian Medri wrote: > >>> Hi! > >>>?? I have a function: > >>> bestfit=:(],0{&<.&<.0.5+(1+0.01*(?30)-15)*(((+/ % #)*1+#)-(+/))) > >>> that calculates the n+1 element. > >>> bestfit 90 90 90 > >>> 90 90 90 81 > >>> The tacit form doesn't work properly, because the "?" is not active every > >>> time I call bestfit 90 90 90. > >>> When I use > >>> (],0{&<.&<.0.5+(1+0.01*(?50)-25)*(((+/ % #)*1+#)-(+/))) 90 90 90 > >>>?? then the function works properly. > >>> > >>> My question is if it is possible to have a tacit verb with the "?" active. > >>> > >>> Thanks > >>> > >>> Gian Medri > >>> ---------------------------------------------------------------------- > >>> 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 > > End of Programming Digest, Vol 73, Issue 8 > ****************************************** ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
