simple question, please help

[catxie]

what is the meaning of function "arg min" ? I know min stands for minimum, how about arg? anyway, what does this function do?

[NotLKH]

What are you looking at? What App?

-Lou

[catxie]

well, it is a document about Trading Agents Competetion(TAC),
and I met this expression/formular(whatever you call it) with this function "arg min(......)" I can't type it here exactly cos some of the characters are just not on the keyboard. Any idea what
"are min" means?

[A$$Bandit]

Well, Arg(z) returns the principal argument of a complex number z.

If z = x + iy, Arg(z) = tan^-1(y/x).

Sorry if you knew that anyways, but if not I hope it helps...

[catxie]

um.... I think "arg" plays a different in our cases, mine is all about integer calculation so it is not way that complex number will get in... But thanks for your help.

[SilverSprite]

What is principal argument?

[NotLKH]

Originally posted by catxie
well, it is a document about Trading Agents Competetion(TAC),
and I met this expression/formular(whatever you call it) with this function "arg min(......)" I can't type it here exactly cos some of the characters are just not on the keyboard. Any idea what
"are min" means?

Post a screen shot, by doing the following:

1) With your app open, and this "arg min" thing visible, hit "Print Screen"

2) Open "Paint" Under Accessories, assuming you have it and its similarly located.

3) Hit "Edit -> Paste", and say "Yes" if it wants to enlarge the bitmap

4) DO a "Save As", and select *.gif. Name it something, store it somewhere simple.

5) Come Back Here, Post a reply to this thread, and attach the .gif you just created.

This way, we can see exactly what you're talking about.

[catxie]

yeah, good Idea, there goes my screen shot of "Arg min" function