Re: [Jprogramming] Collatz and stuff

2012-10-29 Thread Linda Alvord
Kip, This is impressive! If I had ever learned how to write formal proofs, I think there must be one lurking in here somewhere: collatz =: ([:$: (] , -:@{:)`(] , 1 + 3 * {:)@.(2&|@{:))`]@.(1= {:) Your definition (slight style modification) Ckm=: ([:$: (] , [:-:{:)`(] , 1 + 3 * {:)@

Re: [Jprogramming] Collatz and stuff

2012-10-29 Thread Linda Alvord
J is at least pretty convincing: ((Ckm 325479) e.p0 360)#Ckm 325479 109 41 31 47 71 107 137 103 233 263 167 251 283 61 23 53 5 2 ((Ckm 2357637391) e.p0 360)#Ckm 2357637391 31 47 71 107 137 103 233 263 167 251 283 61 23 53 5 2 $Ckm 2357637391 234 Sooner or later it will get to a p

Re: [Jprogramming] Taylor series

2012-10-29 Thread Raul Miller
In this case, it's doing this: ^ t. %@! the dictionary definition suggests that we should instead be getting something like this: %@! :(^ * %@!@])"0 I'm not sure, though, what good that extra complexity would achieve. It's possible, for example, that that text for the dyadic case of a taylor

Re: [Jprogramming] Taylor series

2012-10-29 Thread Brian Schott
^t. %@! *:t. {&0 0 1 0x@(3&<.) Raul, Why are you expecting the more complex result from `^t.`? And btw, the result from *: is striking to me because of the x in it. At first I thought it was for the left argument, but the realized it is to force precision. --- (B=) On Oct 29, 2012, at

Re: [Jprogramming] Taylor series

2012-10-29 Thread Raul Miller
Brian, a dictionary page for t. http://www.jsoftware.com/help/dictionary/dtdotu.htm says: x u t.y is the product of (x^y) and u t. y . The complex verb in my previous email was built to satisfy this definition. Does this make sense? -- Raul On Mon, Oct 29, 2012 at 10:09 AM, Brian Scho

Re: [Jprogramming] Taylor series

2012-10-29 Thread Brian Schott
Yes, it does make sense. My bad. --- (B=) On Oct 29, 2012, at 10:27 AM, Raul Miller wrote: > Brian, a dictionary page for t. > http://www.jsoftware.com/help/dictionary/dtdotu.htm says: > >x u t.y is the product of (x^y) and u t. y . > > The complex verb in my previous email was built

Re: [Jprogramming] Playing WAV files

2012-10-29 Thread Raul Miller
Which platform? Last I checked we had a media/wav addon but it was built for windows -- needed interest from *nix folk to do portability, or something. -- Raul On Mon, Oct 29, 2012 at 4:12 PM, Y-01 wrote: > Hi, All > > Is there *lib.ijs for playing .WAV files? Or what is the most classical way