# logit

From HH v3.1-35
by Richard Heiberger

##### Logistic and odds functions and their inverses.

Logistic and odds functions and their inverses.

- Keywords
- math

##### Usage

```
logit(p)
antilogit(x)
```odds(p)
antiodds(o)

##### Arguments

- p
Probability value, a vector of numbers between 0 and 1, inclusive.

- x
Real number, a vector of numbers between

`-Inf`

and`Inf`

.- o
Real number, a vector of numbers between

`0`

and`Inf`

.

##### Value

Vector of real values `log(p/(1-p))`

for `logit`

.
Vector of probabilities `exp(x)/(1+exp(x))`

for `antilogit`

with
boundary values of `-Inf`

and `Inf`

for `x`

correctly handled.
Vector of real values `p/(1-p)`

for `odds`

.
Vector of probabilities `o/(o+1)`

for `antiodds`

with the
boundary value of `Inf`

for `o`

correctly handled.

##### Examples

```
# NOT RUN {
logit(seq(0, 1, .1))
antilogit(logit(seq(0, 1, .1)))
odds(seq(0, 1, .1))
antiodds(odds(seq(0, 1, .1)))
# }
```

*Documentation reproduced from package HH, version 3.1-35, License: GPL (>= 2)*

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