eraminus: ERA-

In Sabermetrics: Sabermetrics Functions for Baseball Analytics

Description

ERA- is a park-adjusted version of ERA

Usage

eraminus(ERA, ParkFactor, LeagueERA)

Arguments

ERA	Player ERA
ParkFactor	Park Factor
LeagueERA	League Average ERA

Details

League Average is set to 100 each season. Each point below or above 100 is one percentage point better or worse than league average.

Value

Returns a value equal to (ERA+(ERA-(ERA*(ParkFactor/100))))/(LeagueERA)*100

Note

Park Factors can be found in the references section

Author(s)

Peter Xenopoulos

References

http://www.fangraphs.com/library/pitching/era-fip-xfip/ http://www.fangraphs.com/guts.aspx?type=pf&teamid=0&season=2014

See Also

era,fipminus,xfipminus

Examples

## The function is currently defined as
function (ERA, ParkFactor, LeagueERA) 
{
    eraminus <- (ERA + (ERA - (ERA * (ParkFactor/100))))/(LeagueERA) * 
        100
    return(eraminus)
  }

Sabermetrics documentation built on Jan. 15, 2017, 7:34 p.m.