inv_logit {BPrinStratTTE} | R Documentation |
Inverse logit function
Description
Inverse logit function
Usage
inv_logit(x)
Arguments
x |
Numeric value (usually a logarithm of odds). |
Details
The inverse logit function is also known as logistic function.
Value
Numeric value on the interval [0,1]
, result of log(pi/(1-pi))
.
Numeric value, result of exp(x)/(1+exp(x))
.
See Also
Examples
# probabilities
prob_ICE_base <- 0.3
prob_ICE_risk <- 0.6
# model coefficients
(beta1 <- logit(prob_ICE_base))
(beta2 <- logit(prob_ICE_risk) - logit(prob_ICE_base))
# linear predictor
logit(prob_ICE_base); (lin_pred1 <- beta1 + beta2*0)
logit(prob_ICE_risk); (lin_pred2 <- beta1 + beta2*1)
# inverse logit of linear predictor
(inv_logit(lin_pred1)) # prob for X1 = 0
(inv_logit(lin_pred2)) # prob for X1 = 1
[Package BPrinStratTTE version 0.0.7 Index]