Poisson Log Likelihood Function

The log likelihood of a Poisson density with data, x, lambda parameter.

likpois(lambda, x, log = FALSE)

Arguments

lambda

vector of (non-negative) means.
x

vector of (non-negative integer) quantiles.
log

logical; if TRUE, probabilities p are given as log(p).

Value

A numeric scalar for the log likelihood of the Poisson density given the data where lambda can be held constant or if vector were given vector will be returned.

Details

The log likelihood is the log of a function of parameters given the data.

Examples

likpois(x = rpois(n = 2, lambda = 4),
        lambda = 4)
#> [1] 0.02035637