Sabermetrics (version 1.0)

dice: Defense-Independent Component ERA (DICE)

Description

A function gives a number that is better at predicting a pitcher's ERA in the following year than the pitcher's actual ERA in the current year.

Usage

dice(HR, BB, HBP, K, IP)

Arguments

HR

Home Runs Allowed

BB

Walks Allowed

HBP

Batters Hit

K

Strikeouts

IP

Innings Pitched

Value

• Returns 3 + ((13*HR+3*BB+3*HBP-2*K)/IP)

References

http://en.wikipedia.org/wiki/Defense_independent_pitching_statistics

Examples

## Defense-Independent Component ERA (dice) function is currently defined as
function (HR, BB, HBP, K, IP) 
{
    defenseERA <- 3 + ((13 * HR + 3 * BB + 3 * HBP - 2 * K)/IP)
    return(defenseERA)
  }
  
## Let's take 2014's MLB MVP, Clayton Kershaw, and find his DICE
## Stats for Clayton Kershaw available on
## http://www.baseball-reference.com/players/k/kershcl01-pitch.shtml
## For 2014, Kershaw allowed 9 HR, 31 BB, 2 HBP, 239 K, and 198.1 IP
## The formula for his DICE using the dice function is below
## Output should be 1.677436
dice(9,31,2,239,198.1)