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<title>To Sink or Not to Sink, That Is the Question</title>
<link>http://blog.roodo.com/Whither/archives/8720573.html/</link>
<description><![CDATA[My Plurk: http://www.plurk.com/whither, Twitter: http://twitter.com/Whither


　　為什麼王建民的 Sinker 掉不下來？投球姿勢改變，影響球速和送球角度，出手點較貼身又拉高，造成自旋軸過平，因此下墜幅度不足。（未完待續……不能熬夜，否則妻子會擔心。所以有興趣的人請自己比比看，到底哪裡不一樣？那便是問題所在。）


【相關前文】(Related Articles)
《以 New Gameday 數據解析王建民的投球特性》(Analysis of Wang's Pitching Stuff via New Gameday Data)
《失真的 Gameday》(The Compromised Gameday)
《王建民振臂伏虎 Gameday 特輯》(Gameday Special Edition of Chien-Ming Wang)
《Gameday 龍珠雷達》(Gameday Dragon Ball Radar)
《For Gameday Regulars Only》

]]>
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<atom:link href="http://blog.roodo.com/Whither/archives/8720573-comment.xml" rel="self" type="application/rss+xml" />
<item>
	<title>回應：To Sink or Not to Sink, That Is the Question</title>
	<description><![CDATA[版主您好：
不好意思，
我不清楚gameday系統
冒昧請問
「只是文中所引數據其實皆為PFX值，前者為X軸分量Pfx-X；後者則是Z軸分量Pfx-Z，而非Break。請讀者細察，以免誤將Gameday線上轉播畫面裡的PFX當作尾勁橫移量。」

如果要衡量尾勁的話，是指自 MLB 的 Gameday 系統資料庫所儲存的 XML 檔案格式轉換成試算表，例如pfx_x="-10.250" pfx_z="10.827，而非Gameday線上轉播畫面裡的PFX當作尾勁橫移量嗎 
謝謝。]]>
	</description>
	<link>http://blog.roodo.com/Whither/archives/8720573.html</link>
	<guid>http://blog.roodo.com/Whither/archives/8720573.html#comment-19571671</guid>
		<category>文章回應</category>
	<pubDate>Thu, 23 Jul 2009 11:29:22 +0800</pubDate>
</item>
<item>
	<title>回應：To Sink or Not to Sink, That Is the Question</title>
	<description><![CDATA[待補。]]>
	</description>
	<link>http://blog.roodo.com/Whither/archives/8720573.html</link>
	<guid>http://blog.roodo.com/Whither/archives/8720573.html#comment-19511545</guid>
		<category>文章回應</category>
	<pubDate>Thu, 09 Jul 2009 01:25:22 +0800</pubDate>
</item>
<item>
	<title>回應：To Sink or Not to Sink, That Is the Question</title>
	<description><![CDATA[剛看到誤會大了
那則

我記得06年季後賽是Break先出來
隔年在定義上把舊的Break變成PFX

而新的Break
是後來再給予新定義的......

然後好像蠻多網友都一知半解
把......搞在一起
尤其是說到Movement時
更扯的是那位專欄作家
這會導致更多人誤解

加上國外的網站看數值前
最重要是看它的定義
但蠻多網友
好像都不太看定義

隨便亂套
他可能看到Break
或Movement
就亂套一通

但他應該搞清楚何時是MLB官方的定義
何時是一般單字的意思

不然很多聯合新聞的網友
都被誤導了
尤其那篇還那麼多人回應
Whither大 告知時
已經是第六頁
看來當時那篇新聞已經慢慢退燒了
那麼多誤會的人 可能就......


作者應該好好來像您學習才是]]>
	</description>
	<link>http://blog.roodo.com/Whither/archives/8720573.html</link>
	<guid>http://blog.roodo.com/Whither/archives/8720573.html#comment-19403691</guid>
		<category>文章回應</category>
	<pubDate>Fri, 19 Jun 2009 17:09:31 +0800</pubDate>
</item>
<item>
	<title>回應：To Sink or Not to Sink, That Is the Question</title>
	<description><![CDATA[To IBIZA,

　IBIZA 君所言真是一語驚醒夢中人。據傳洋基球團已速將喜愛自由爵士樂的白目公關人員誤輸入王建民 iPod 中可怕的《Yankees》刪除，換成 Frank Sinatra 的專輯《Trilogy》之後，王建民的球速和尾勁都恢復正常了！（感謝 IBIZA 君熱情回應敝處無聊棒球文。）

<a target="_blank" href="http://www.allmusic.com/cg/amg.dll?p=amg&sql=10:3cfexq9gldde"><img src="http://image.allmusic.com/00/amg/cov200/dre900/e916/e916928eyik.jpg"></a>　　<a target="_blank" href="http://www.allmusic.com/cg/amg.dll?p=amg&sql=10:0bfrxq95ldhe"><img src="http://image.allmusic.com/00/amg/cov200/drc500/c509/c509652o5ox.jpg"></a>]]>
	</description>
	<link>http://blog.roodo.com/Whither/archives/8720573.html</link>
	<guid>http://blog.roodo.com/Whither/archives/8720573.html#comment-18999753</guid>
		<category>文章回應</category>
	<pubDate>Wed, 29 Apr 2009 00:12:01 +0800</pubDate>
</item>
<item>
	<title>回應：To Sink or Not to Sink, That Is the Question</title>
	<description><![CDATA[我在想
會不會是音樂出了問題：

比較舊球場與新球場的《New York, New York》
擴音器的擺設、音場問題
交叉比對小王ipod轉出與轉入的MP3
將這些數據出入Musicday系統……（掰不下去了）
（純鬧場）]]>
	</description>
	<link>http://blog.roodo.com/Whither/archives/8720573.html</link>
	<guid>http://blog.roodo.com/Whither/archives/8720573.html#comment-18992125</guid>
		<category>文章回應</category>
	<pubDate>Mon, 27 Apr 2009 16:59:34 +0800</pubDate>
</item>
<item>
	<title>回應：To Sink or Not to Sink, That Is the Question</title>
	<description><![CDATA[To michael,

　多謝 michael 君提醒，已將所擷取的新聞圖片移除。再次感謝。]]>
	</description>
	<link>http://blog.roodo.com/Whither/archives/8720573.html</link>
	<guid>http://blog.roodo.com/Whither/archives/8720573.html#comment-18966243</guid>
		<category>文章回應</category>
	<pubDate>Wed, 22 Apr 2009 20:32:17 +0800</pubDate>
</item>
<item>
	<title>回應：To Sink or Not to Sink, That Is the Question</title>
	<description><![CDATA[聊點題外話，關於著作權法的修正，以後轉貼網路新聞文字及圖片可能都會有侵權疑慮，請Whither要先去了解一下狀況，避免一些不必要的問題產生。]]>
	</description>
	<link>http://blog.roodo.com/Whither/archives/8720573.html</link>
	<guid>http://blog.roodo.com/Whither/archives/8720573.html#comment-18962677</guid>
		<category>文章回應</category>
	<pubDate>Wed, 22 Apr 2009 11:05:07 +0800</pubDate>
</item>
<item>
	<title>回應：To Sink or Not to Sink, That Is the Question</title>
	<description><![CDATA[To eek,

　若真要歸因心魔作祟，至多也只能解釋後兩場的表現，然而相關數據的差距，自開季便已顯現，過幾天有時間我會試著補充說明。洋基隊目前對王建民的問題掌握與修正方向大致無誤，衷心期盼這一切早日雨過天青。


To randoll,

　Thank you for your encouragement. It’s been a pleasure to meet and learn much from PITCHf/x maniac all over the world, especially another Chien-Ming Wang fan. Welcome. Your PITCHf/x blog fulls of so many interesting analyses and in-depth reports. My appreciation is beyond language barriers.

　Those polar plots for spin rate & spin axis direction were drawn by "KaleidaGraph", a data analysis and graphing software. KaleidaGraph provides several graphic functions for statistical purpose. However, we can produce similar polar plot just by Excel. All you need is following coordinate transformation:

　　x = spin rate * cos (φ/360 * 2π)
　　y = spin rate * sin (φ/360 * 2π)

　And then draw a x-y graph by these (x, y) coordinates. Take Wang’s PITCHf/x data of "Game@TB, 2008/05/13" for example:

<center><img src="http://blog.roodo.com/Whither/ea0c2f17.png"></center>

　Hope this would be helpful. Enjoy it. Have a nice (game)day.]]>
	</description>
	<link>http://blog.roodo.com/Whither/archives/8720573.html</link>
	<guid>http://blog.roodo.com/Whither/archives/8720573.html#comment-18961701</guid>
		<category>文章回應</category>
	<pubDate>Wed, 22 Apr 2009 00:51:36 +0800</pubDate>
</item>
<item>
	<title>回應：To Sink or Not to Sink, That Is the Question</title>
	<description><![CDATA[hi, I am a pitch f/x mania from South Korea. 
I'm really impressed by your post about Chien-Ming Wang(I also a huge fan of Wang). 

IF... you don't mind, could you tell me how to draw the chart like that? especially the speed-spinrate system... I cannot plot like that by excel.. :'(

all of your plots are excellent...!
have a nice day!

Fan from South Korea.]]>
	</description>
	<link>http://blog.roodo.com/Whither/archives/8720573.html</link>
	<guid>http://blog.roodo.com/Whither/archives/8720573.html#comment-18950259</guid>
	<author>landor82@gmail.com(randoll)</author>	<category>文章回應</category>
	<pubDate>Mon, 20 Apr 2009 03:53:56 +0800</pubDate>
</item>
<item>
	<title>回應：To Sink or Not to Sink, That Is the Question</title>
	<description><![CDATA[看到小民現在的樣子,讓我想到電影The Legend of Bagger Vance的情節,心魔吧]]>
	</description>
	<link>http://blog.roodo.com/Whither/archives/8720573.html</link>
	<guid>http://blog.roodo.com/Whither/archives/8720573.html#comment-18949917</guid>
		<category>文章回應</category>
	<pubDate>Mon, 20 Apr 2009 00:44:08 +0800</pubDate>
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