Does Historical import include park factors?

jarmenia · 11-07-2007, 08:46 AM

I know when I run the historical import from 1901 - 2006 the stadiums names get changed when the did in real life. Do the park factors also change and are they historically correct?

John

ctorg · 11-07-2007, 09:50 AM

Yes.

jarmenia · 11-07-2007, 10:15 AM

Quote:

Originally Posted by ctorg

Yes.

Thanks Ctorg

Kelric · 11-07-2007, 12:43 PM

I don't know if the Park Factors are completely correct (they may be, but I haven't looked into it), but they definitely do change as they go along. My guess would be they generally follow basic guidelines: a pitcher's park might be all .970 rather than having fluctuations for left and right handedness, for example.

ctorg · 11-07-2007, 01:14 PM

They are accurate to the degree that they are accurate in Lahman (as with so many things in historical leagues). So if Lahman has it that the park factor is 97, it will be .970 across the board in OOTP because Lahman doesn't differentiate between lefties, righties, homeruns, hits, doubles, and triples.

jarmenia · 11-07-2007, 01:22 PM

Quote:

Originally Posted by ctorg

They are accurate to the degree that they are accurate in Lahman (as with so many things in historical leagues). So if Lahman has it that the park factor is 97, it will be .970 across the board in OOTP because Lahman doesn't differentiate between lefties, righties, homeruns, hits, doubles, and triples.

That's good enough for me. Thanks again!

Kelric · 11-07-2007, 02:51 PM

I was close enough. You just knew more details.

Garlon · 11-07-2007, 04:35 PM

The Lahman park factors are Run Factors...and these factors do not even refer to the park itself, rather it refers to the effect playing half of thegames in that park will have on a player's stats.

OOTP uses this factor as component factors which is completely wrong.

Custom park factors need to be calculated a different way, and I am currently working on a park factor project based on available Run and HR data for parks pre-1960, and using Retrosheet for component park data for ballparks post-1960.

jarmenia · 11-07-2007, 04:48 PM

Quote:

Originally Posted by Garlon

The Lahman park factors are Run Factors...and these factors do not even refer to the park itself, rather it refers to the effect playing half of thegames in that park will have on a player's stats.

What's the difference?

Garlon · 11-07-2007, 04:53 PM

Well consider a park factor of 90.

1 hit does not = 1 run

So you can't say that the hits factor of a park factor of 90 should be .90. That assumes 10% fewer hits means 10% fewer runs...not to mention you would be applying this to extra base hits too.

11-07-2007, 08:46 AM	#1 (permalink)
jarmenia Hall Of Famer Join Date: Mar 2002 Location: Tampa, FL USA Posts: 4,289 Thanks: 27 Thanked 46x in 31 posts	Does Historical import include park factors? I know when I run the historical import from 1901 - 2006 the stadiums names get changed when the did in real life. Do the park factors also change and are they historically correct? John __________________ When is good enough, good enough?

11-07-2007, 09:50 AM	#2 (permalink)
ctorg Global Moderator Join Date: Nov 2002 Location: Brooklyn, NY Posts: 9,701 Thanks: 38 Thanked 91x in 51 posts	Yes. __________________ THE VERY US ARTISTS - A project for musicians and visual artists My music Currently reading: Thirteen by Richard Morgan "When the trees blow back and forth, that's what makes the wind." - Steven Wright Fjord emena pancreas thorax fornicate marmalade morpheme proteolysis smaxa cabana offal srue vitriol grope hallelujah lentils

11-07-2007, 12:43 PM	#4 (permalink)
Kelric Hall Of Famer Join Date: Mar 2002 Location: Greater Boston Area Posts: 3,983 Thanks: 7 Thanked 46x in 36 posts	I don't know if the Park Factors are completely correct (they may be, but I haven't looked into it), but they definitely do change as they go along. My guess would be they generally follow basic guidelines: a pitcher's park might be all .970 rather than having fluctuations for left and right handedness, for example. __________________ Former Co-Commish and owner of the Boston Red Sox, 1783-1144, .609%, of the defunct Overlords Baseball League (1930-48). 17 Division wins, 9 ALCS wins, 5 World Series wins.

11-07-2007, 01:14 PM	#5 (permalink)
ctorg Global Moderator Join Date: Nov 2002 Location: Brooklyn, NY Posts: 9,701 Thanks: 38 Thanked 91x in 51 posts	They are accurate to the degree that they are accurate in Lahman (as with so many things in historical leagues). So if Lahman has it that the park factor is 97, it will be .970 across the board in OOTP because Lahman doesn't differentiate between lefties, righties, homeruns, hits, doubles, and triples. __________________ THE VERY US ARTISTS - A project for musicians and visual artists My music Currently reading: Thirteen by Richard Morgan "When the trees blow back and forth, that's what makes the wind." - Steven Wright Fjord emena pancreas thorax fornicate marmalade morpheme proteolysis smaxa cabana offal srue vitriol grope hallelujah lentils

11-07-2007, 02:51 PM	#7 (permalink)
Kelric Hall Of Famer Join Date: Mar 2002 Location: Greater Boston Area Posts: 3,983 Thanks: 7 Thanked 46x in 36 posts	I was close enough. You just knew more details. __________________ Former Co-Commish and owner of the Boston Red Sox, 1783-1144, .609%, of the defunct Overlords Baseball League (1930-48). 17 Division wins, 9 ALCS wins, 5 World Series wins.

11-07-2007, 04:35 PM	#8 (permalink)
Garlon All Star Starter Join Date: Jun 2004 Posts: 1,551 Thanks: 0 Thanked 52x in 26 posts	The Lahman park factors are Run Factors...and these factors do not even refer to the park itself, rather it refers to the effect playing half of thegames in that park will have on a player's stats. OOTP uses this factor as component factors which is completely wrong. Custom park factors need to be calculated a different way, and I am currently working on a park factor project based on available Run and HR data for parks pre-1960, and using Retrosheet for component park data for ballparks post-1960.

11-07-2007, 04:53 PM	#10 (permalink)
Garlon All Star Starter Join Date: Jun 2004 Posts: 1,551 Thanks: 0 Thanked 52x in 26 posts	Well consider a park factor of 90. 1 hit does not = 1 run So you can't say that the hits factor of a park factor of 90 should be .90. That assumes 10% fewer hits means 10% fewer runs...not to mention you would be applying this to extra base hits too.

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