Logit and inverse-logit functions

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Description

logit() performs the logit function expit() performs the inverse logit function

Usage

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logit(p)
expit(x)

Arguments

p

A vector of probabilities on the interval [0,1] to be transformed into numbers on the real line.

x

A vector of numbers on the real line to be transformed into probabilities.

Details

The logit function is log(p / (1 - p)). The expit function is exp(x)/(1 + exp(x)).

Value

logit returns a vector of real numbers. expit returns a vector of probabilities.