CSS Button No Image Css3Menu.com

Baseball Prospectus home
  
  

Search Article Archives

Find:   

Author:    Article: 
Search Date (From):    Search Date (To):   
Sort Results by:  Relevance
 Date
Show me  Results

   Show Article Summaries

New! Search comments:      
(NOTE: Relevance, Author, and Article are not applicable for comment searches)

cehill
1 comments | 0 total rating | 0.00 average rating
Facebook Twitter email a friend
Share comments by 'cehill' posted at
Baseball Prospectus http://bbp.cx/i/16731
cehill
(16731)
Comment rating: 0

I agree with Mike W.'s implied criticism. Some sort of systematic error (or just "difference") in the measuring apparatus would show exactly the same change. Maybe you have complete confidence in pitchFX data, but the average reader doesn't know enough to. Could readings be different at different stadiums, or on different days? Is there a calibration process? How, if you think about it, would you produce a "standard" 90mph fastball, to be sure your setup was calibrated right? I know this is just a quick post rather than an article, but if you had a link to an article that covered the reliability of pitchFX it would have been useful to put it in. And as for strongarming Excel into plotting several sets of data points on a scatterplot, davelew had that right - at the "source data" step, click on "series" and use that window to make sure you plot "game 1 fastballs vs. pitch count" and "game 2 fastballs vs. pitch count." You'll figure it out - you enter the x and Y ranges separately for each "series" (game in your example). Excel sucks for scatterplots but you *can* bend it to your will this way.

Apr 08, 2009 10:01 AM on Being An A's Fan