MATLAB Central Spring Contest
in [Matlab]
|
From: the cyclist on 7 May 2008 12:06 "Helen Chen" <helen.chen(a)mathworks.com> wrote in message <fv82i0$nql$1(a)fred.mathworks.com>... > Just a reminder to let everyone know that the Spring Contest > launches tomorrow, Wednesday May 30th at high noon. Be > there or be square! > > See you then! > Helen Thanks for running another fun contest. Not actually having access to MATLAB anymore took some fun out of it. 8-/ Didn't stop me from tweaking here and there, though.
From: Yi Cao on 7 May 2008 12:26 How about using an anti-spam tech, such the one used for File Exchange review comments to prevent automatic submissions, i.e. a user has to copy certain characters shown on the screen before he/she can submit a code. This has been used in File Exchange, hence should not be difficult for TMW to implement in the contest page. Yi
From: David on 7 May 2008 12:49 "the cyclist" <thecyclist(a)letter.after.f.mail.com> wrote in message <fvsk1d$m84$1(a)fred.mathworks.com>... > "Helen Chen" <helen.chen(a)mathworks.com> wrote in message > <fv82i0$nql$1(a)fred.mathworks.com>... > > Just a reminder to let everyone know that the Spring Contest > > launches tomorrow, Wednesday May 30th at high noon. Be > > there or be square! > > > > See you then! > > Helen > > Thanks for running another fun contest. Not actually having > access to MATLAB anymore took some fun out of it. 8-/ > Didn't stop me from tweaking here and there, though. Congratulations to Tim for winning the 1000 node prize, ... without actually having access to MATLAB ! -- David Jones
From: Yi Cao on 7 May 2008 13:29 I strongly agree that using random function will discourage algorithmic development because a well-tuned random code will significantly disadvantage any new algorithm, which has not been tuned for the specific test suite. As Markus said, using random functions here is total different from the use in a GA type algorithm, where the statistical nature of a random function is used to get the optimal solution. However, here, the random function is used just like other parameters to be tuned specificly for the test suite. By doing so, when altering an algorithm, the number of random function calls will change as well, hence the result is completely unpredictable. The main problem with random function is that it has 'memory', so that previours use of a random function will affect the follows. As Nathan mentioned, disallowing random function will not solve the problem because a user can develop his own. However, I would like to suggest to use a random function in runcontest function to make tuning random parameters imposible. For example, in runcontest function, a line of rand('state',sum(100*clock)) can make any intention to tune a random parameter impossible because even with the same parameters, the results could be totally different if a random function is used in a code. Yi
From: Steve Hoelzer on 7 May 2008 13:58
"Yi Cao" <y.cao(a)cranfield.ac.uk> wrote in message <fvsl6t$5db$1(a)fred.mathworks.com>... > How about using an anti-spam tech, such the one used for > File Exchange review comments to prevent automatic > submissions, i.e. a user has to copy certain characters > shown on the screen before he/she can submit a code. This > has been used in File Exchange, hence should not be > difficult for TMW to implement in the contest page. > > Yi Excellent idea! It wouldn't eliminate tweak bombing, but at least it would make it harder. |