arctan（x）

来源: bearsback 于 2010-01-11 21:16:35 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (111 bytes)
回答: 回复：想谁了？我为你鸿书传话.. 由 bearsback 于 2010-01-11 14:26:41

(1/2) + (1/pi)* arctan (1/x) is a distribution function of a t-distribution
I am learning now
ha

所有跟帖： 

• oops a special case of t-dist -bearsback- ♂ 给 bearsback 发送悄悄话 bearsback 的博客首页 (0 bytes) () 01/11/2010 postreply 21:19:40

• it looks hard. i don't even want to try.. -戏雨飞鹰- ♀ 给 戏雨飞鹰 发送悄悄话 戏雨飞鹰 的博客首页 (0 bytes) () 01/11/2010 postreply 21:27:26

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