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ct值差距換算勝率
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Rex
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Apr 8, 2012, 11:01:24 PM
4/8/12
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因為未來社長已經嗆了教學兩次,說是ct值低又如何,還不是能打
贏你云云。所以我就想,是不是能把ct值的差距轉換成相對的勝率
……結果就出現這個了:
0.5-0.5 tanh((0.25 tanh^(-1)(3/7))x)
這個函數是怎麼來的呢?首先我得先找到一個定義域在實數,而值域
在[0,1]的函數,而且在正無限大的值要是0(代表對手比你強
太多,根本沒機會贏),在負無限大的值要是1。
所以就把tanh
調整一下得到0.5-0.5tanh(Cx),剛好這個函數在x
=0時等於0.5,代表實力相當時,輸贏的機率是各一半。
接著要求常數C,我就順手拿了之前和林五行的戰績2:5,和他之
前的發言:「我和你差了4ct」來當作資料,得到C=0.25t
anh^(-1)(3/7)。
有趣的是,如果拿未來社長和林五行的差距6.5ct來代入的話:
0.184076
也就是說未來社長還是有將近(但不到)五分之一的機率能贏林五行
。
Tim,wait!
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Apr 22, 2012, 9:18:07 PM
4/22/12
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tanh
?
Rex於 2012年4月9日星期一UTC+8上午11時01分24秒寫道:
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