RBesT (version 1.5-4)

lodds: Logit (log-odds) and inverse-logit function.

Description

Calculates the logit (log-odds) and inverse-logit.

Usage

logit(mu)
inv_logit(eta)

Arguments

mu

A numeric object with probabilies, with values in the in the range [0,1]. Missing values (NAs) are allowed.

eta

A numeric object with log-odds values, with values in the range [-Inf,Inf]. Missing values (NAs) are allowed.

Value

A numeric object of the same type as mu and eta containing the logits or inverse logit of the input values. The logit and inverse transformation equates to

$$\mbox{logit}(\mu) = \log(\mu/(1-\mu))$$ $$\mbox{logit}^{-1}(\eta)= \exp(\eta)/(1 + \exp(\eta)).$$

Details

Values of mu equal to 0 or 1 will return -Inf or Inf respectively.

Examples

# NOT RUN {
logit(0.2)
inv_logit(-1.386)

# }