Description Usage Arguments Details Value Note Author(s) References See Also Examples
ERA- is a park-adjusted version of ERA
1 | eraminus(ERA, ParkFactor, LeagueERA)
|
ERA |
Player ERA |
ParkFactor |
Park Factor |
LeagueERA |
League Average ERA |
League Average is set to 100 each season. Each point below or above 100 is one percentage point better or worse than league average.
Returns a value equal to (ERA+(ERA-(ERA*(ParkFactor/100))))/(LeagueERA)*100
Park Factors can be found in the references section
Peter Xenopoulos
http://www.fangraphs.com/library/pitching/era-fip-xfip/ http://www.fangraphs.com/guts.aspx?type=pf&teamid=0&season=2014
era,fipminus,xfipminus
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