Logit: Logit of a Probability Vector
In SALTSampler: Efficient Sampling on the Simplex

Returns the logit of a vector of probabilities, p. When logp is set to TRUE, the second argument contains natural logs of probabilities.

1	Logit(p, logp = FALSE)

`p`	Vector of probabilities or log probabilities
`logp`	Boolean which is `FALSE` when the first argument contains probabilities and `TRUE` when the first argument contains log probabilities

#Find logit on natural scale
a <- c(0.4, 0.4, 0.1, 0.1)
Logit(p = a)

#Find logit on log scale
b <- c(log(1e-4), log(1e-6), log(1 - 1e-6))
b <- b/sum(b)
Logit(p = b, logp = FALSE)