| --- Log opened Tue Feb 01 00:00:12 2011 |
| 00:19 | | shade_of_cpux is now known as cpux |
| 00:42 | | You're now known as TheWatcher[T-2] |
| 00:45 | | You're now known as TheWatcher[zZzZ] |
| 01:24 | | Vornicus-Latens is now known as Vornicus |
| 02:26 | | gnolam [lenin@Nightstar-38637aa0.priv.bahnhof.se] has quit [[NS] Quit: Z?] |
| 03:10 | | KiMo|OpenGL is now known as Kindamoody |
| 03:59 | | kwsn [kwsn@Nightstar-7426b23f.dyn.centurytel.net] has joined #code |
| 04:07 | | Kindamoody is now known as Kindamoody[zZz] |
| 04:18 | | cpux is now known as shade_of_cpux |
| 06:12 | | AnnoDomini [annodomini@Nightstar-4fcc2b41.adsl.tpnet.pl] has joined #code |
| 06:12 | | mode/#code [+o AnnoDomini] by Reiver |
| 06:17 | | celticminstrel [celticminst@Nightstar-f8b608eb.cable.rogers.com] has quit [[NS] Quit: And lo! The computer falls into a deep sleep, to awake again some other day!] |
| 06:26 | | kwsn is now known as kwsn\t-2 |
| 06:26 | | kwsn\t-2 [kwsn@Nightstar-7426b23f.dyn.centurytel.net] has quit [[NS] Quit: poof] |
| 07:11 | | You're now known as TheWatcher |
| 08:11 | | You're now known as TheWatcher[afk] |
| 09:05 | | Vornicus is now known as Vornicus-Latens |
| 09:42 | | Kindamoody[zZz] is now known as Kindamoody |
| 10:00 | | AnnoDomini [annodomini@Nightstar-4fcc2b41.adsl.tpnet.pl] has quit [[NS] Quit: leaving] |
| 10:01 | | You're now known as TheWatcher |
| 10:03 | | Orth[mini] [orthia@3CF3A5.E1CD01.36D449.95F5A5] has joined #code |
| 10:26 | | Orth[mini] [orthia@3CF3A5.E1CD01.36D449.95F5A5] has quit [Ping timeout: 121 seconds] |
| 10:33 | | AnnoDomini [annodomini@F67919.F326B3.98D923.BDA7B6] has joined #code |
| 10:33 | | mode/#code [+o AnnoDomini] by Reiver |
| 10:39 | | Orth[mini] [orthia@3CF3A5.E1CD01.36D449.95F5A5] has joined #code |
| 10:39 | | Tarinaky [Tarinaky@Nightstar-f349ca6d.plus.com] has joined #code |
| 10:44 | | EvilDarkLord is now known as EvilFlatLord |
| 11:00 | | Orth[mini] [orthia@3CF3A5.E1CD01.36D449.95F5A5] has quit [Ping timeout: 121 seconds] |
| 11:15 | | gnolam [lenin@Nightstar-38637aa0.priv.bahnhof.se] has joined #code |
| 11:40 | | You're now known as TheWatcher[d00m] |
| 12:11 | | EvilFlatLord is now known as EvilDarkLord |
| 12:46 | | AnnoDomini [annodomini@F67919.F326B3.98D923.BDA7B6] has quit [[NS] Quit: Homewards.] |
| 12:54 | | You're now known as TheWatcher |
| 13:16 | | AnnoDomini [annodomini@Nightstar-4fcc2b41.adsl.tpnet.pl] has joined #code |
| 13:16 | | mode/#code [+o AnnoDomini] by Reiver |
| 13:32 | | AbuDhabi [annodomini@Nightstar-4fcc2b41.adsl.tpnet.pl] has joined #code |
| 13:35 | | AnnoDomini [annodomini@Nightstar-4fcc2b41.adsl.tpnet.pl] has quit [Ping timeout: 121 seconds] |
| 14:24 | <@TheWatcher> | Well fuck |
| 14:24 | < gnolam> | ? |
| 14:25 | <@TheWatcher> | With "use utf8;": BEGIN not safe after errors--compilation aborted at /usr/lib/perl5/5.12.2/Carp.pm line 113. With "use ut8;" commented out, it gets as far as reporting some unrelated errors |
| 14:25 | <@TheWatcher> | from some digging it appears that use utf8 has some Very Interesting and completely broken interactions with Carp under perl 5.12.x |
| 14:38 | | * Rhamphoryncus lights it on fire |
| 14:46 | | You're now known as TheWatcher[afk] |
| 15:15 | | Reiv [orthianz@3CF3A5.E1CD01.36D449.95F5A5] has quit [Connection reset by peer] |
| 15:15 | | Reiv [orthianz@3CF3A5.E1CD01.36D449.95F5A5] has joined #code |
| 15:24 | | Kindamoody is now known as Kindamoody|out |
| 15:46 | | Reiv [orthianz@3CF3A5.E1CD01.36D449.95F5A5] has quit [Connection reset by peer] |
| 15:46 | | Reiv [orthianz@3CF3A5.E1CD01.36D449.95F5A5] has joined #code |
| 17:02 | | You're now known as TheWatcher |
| 17:09 | | AbuDhabi is now known as Mardukth |
| 17:14 | | EvilDarkLord is now known as Maze |
| 17:51 | | Rhamphoryncus [rhamph@Nightstar-473f8685.abhsia.telus.net] has quit [Client exited] |
| 18:43 | | Vornicus-Latens is now known as Vornicus |
| 18:59 | < gnolam> | http://www.exploringbinary.com/java-hangs-when-converting-2-2250738585072012e-30 8/ |
| 19:09 | | RichardBarrell [mycatverbs@Nightstar-3b2c2db2.bethere.co.uk] has joined #code |
| 19:44 | | AbuDhabi [annodomini@Nightstar-c3c7df6b.adsl.tpnet.pl] has joined #code |
| 19:44 | | AbuDhabi is now known as Mardukth_ |
| 19:46 | | Mardukth [annodomini@Nightstar-4fcc2b41.adsl.tpnet.pl] has quit [Ping timeout: 121 seconds] |
| 20:39 | | Mardukth_ is now known as AnnoDomini |
| 20:47 | <@ToxicFrog> | How do I start tackling the equation n/ln(n) == k, for known k? |
| 20:47 | <@ToxicFrog> | I mean, I have a program that will solve it with binary search, but that seems...crude. |
| 20:52 | <@jerith> | Iteratively, start with n=k*ln(k) or somesuch? |
| 20:52 | <@jerith> | Hrm. n = k*ln(n) |
| 20:53 | | * jerith tries to remember exponentials. |
| 21:06 | < RichardBarrell> | Is there any good way to find n-ln(n) = k, for some k? |
| 21:11 | <@jerith> | n**(1/n) = e**(1/k) fwiw |
| 21:12 | <@jerith> | But I'm just playing with identities. Matbe ask in #math. |
| 21:12 | <@jerith> | *Maybe |
| 21:13 | < RichardBarrell> | I am scared by the notion that perhaps that most actual numerical work is either iterative, or the first four of five terms of a Taylor expansion. |
| 21:14 | <@jerith> | Iterative algorithms are usually the easy way to solve numerical problems. |
| 21:15 | <@jerith> | They're certainly what we did the most of in my various engineering classes. |
| 21:16 | <@jerith> | In fact, the "Numerical Methods" course was pretty much all iterative with a little bit of background analysis to show where some of the good starting points are. |
| 21:35 | < RichardBarrell> | Newton-Rhapson works just fine for this. |
| 21:37 | | Tarinaky [Tarinaky@Nightstar-f349ca6d.plus.com] has quit [Connection closed] |
| 21:56 | < RichardBarrell> | ToxicFrog: If you'll pardon my Haskell: newtonRhapson f f' x iterations = if iterations == 0 then x else newtonRhapson f f' (x - (f x / f' x)) (n-1) |
| 21:56 | | Kindamoody|out is now known as Kindamoody|noms |
| 21:57 | < gnolam> | RichardBarrell: Raphson. :) |
| 21:57 | < RichardBarrell> | gnolam: thanks, but I'm going to continue with my spelling error because I defined it earlier |
| 21:57 | < RichardBarrell> | ;D |
| 22:00 | < RichardBarrell> | ToxicFrog: froxicTog k = newtonRhapson (\n -> (n / log n) - k) (\n -> (log n - 1) / (log n * log n)) k 5 -- ((\n -> (n / log n)) . froxicTox) is a close approximation to "id :: Double -> Double". |
| 22:00 | <@TheWatcher> | Sounds like a particularly geeky norwegian singer's name... |
| 22:01 | < RichardBarrell> | gnolam: thank you, by the way. x_x |
| 22:05 | | * Vornicus really likes the iterative method for logarithm. |
| 22:05 | < Vornicus> | (which is Emphatically Not taylor series.) |
| 22:06 | < RichardBarrell> | There's another method which I think is probably faster. |
| 22:07 | < Vornicus> | "probably faster" he says. Let me tell you: the 10,000th iteration of the taylor series for the logarithm has a denominator of 10,000. |
| 22:07 | < RichardBarrell> | Using the newtonRaphson above, but: groxicTog k = let lk = log k in exp $ nr (\a -> a - log a - lk) (\a -> 1 - (1/a)) lk 5 |
| 22:08 | < RichardBarrell> | Vornicus: I meant faster than the "froxicTog" monstrosity that I posted above, which required taking a logarithm twice on every iteration. |
| 22:10 | < Vornicus> | oh, oh. |
| 22:10 | < Vornicus> | Oh, oh, you're solving n/ln(n) = k, I see. |
| 22:10 | < RichardBarrell> | There's a real damn fast way of doing logarithms, too. I call it a "one-element-LUT". Precision is a bit of a bummer, though. ;) |
| 22:12 | < RichardBarrell> | Vornicus: yeah, that was the puzzle that TF posted earlier. I scribbled on paper for a few minutes but couldn't find a non-iterative solution, so I resorted to Newton-Raphson. |
| 22:14 | < RichardBarrell> | ToxicFrog: http://pastebin.starforge.co.uk/451 if you want something actually readable. :) |
| 22:17 | | Kindamoody|noms is now known as Kindamoody |
| 22:18 | < RichardBarrell> | groxicTog's about twice as fast under GHC 6.12.1 with -O2. Yay. |
| 22:28 | | RichardBarrell [mycatverbs@Nightstar-3b2c2db2.bethere.co.uk] has quit [Ping timeout: 121 seconds] |
| 22:37 | | AnnoDomini [annodomini@Nightstar-c3c7df6b.adsl.tpnet.pl] has quit [[NS] Quit: Zzz.] |
| 22:52 | | Alek [omegaboot@Nightstar-96006922.il.comcast.net] has quit [Ping timeout: 121 seconds] |
| 22:52 | | Chi [omegaboot@Nightstar-96006922.il.comcast.net] has joined #code |
| 22:52 | | Chi is now known as Alek |
| 23:00 | | Alek [omegaboot@Nightstar-96006922.il.comcast.net] has quit [Ping timeout: 121 seconds] |
| 23:06 | | Alek [omegaboot@Nightstar-96006922.il.comcast.net] has joined #code |
| 23:17 | | You're now known as TheWatcher[T-2] |
| 23:37 | | RichardBarrell [mycatverbs@Nightstar-ac7cec9b.cable.virginmedia.com] has joined #code |
| 23:38 | | You're now known as TheWatcher[zZzZ] |
| 23:43 | | DBot [Reiver@Nightstar-aec8191b.xnet.co.nz] has joined #code |
| 23:44 | | celticminstrel [celticminst@Nightstar-f8b608eb.cable.rogers.com] has joined #code |
| 23:45 | | DiceBot [Reiver@Nightstar-aec8191b.xnet.co.nz] has quit [Ping timeout: 121 seconds] |
| 23:46 | | DBot is now known as DiceBot |
| --- Log closed Wed Feb 02 00:00:13 2011 |