probabilities, odds, log odds (logits)

logits.R

p <- seq(0,1,.05)
odds <- p/(1-p)
logOdds <- log(odds)

cbind(p, odds, logOdds)

##          p      odds  logOdds
## [1,] 0.00  0.000000     -Inf
## [2,] 0.05  0.052632 -2.94444
## [3,] 0.10  0.111111 -2.19722
## [4,] 0.15  0.176471 -1.73460
## [5,] 0.20  0.250000 -1.38629
## [6,] 0.25  0.333333 -1.09861
## [7,] 0.30  0.428571 -0.84730
## [8,] 0.35  0.538462 -0.61904
## [9,] 0.40  0.666667 -0.40547
##[10,] 0.45  0.818182 -0.20067
##[11,] 0.50  1.000000  0.00000
##[12,] 0.55  1.222222  0.20067
##[13,] 0.60  1.500000  0.40547
##[14,] 0.65  1.857143  0.61904
##[15,] 0.70  2.333333  0.84730
##[16,] 0.75  3.000000  1.09861
##[17,] 0.80  4.000000  1.38629
##[18,] 0.85  5.666667  1.73460
##[19,] 0.90  9.000000  2.19722
##[20,] 0.95 19.000000  2.94444
##[21,] 1.00       Inf      Inf