lognorm (version 0.1.6)

getParmsLognormForMoments: getParmsLognormForMoments

Description

get the mean and variance of a log-normal distribution

Usage

getParmsLognormForMoments(mean, var, sigmaOrig = sqrt(var))

Arguments

mean

expected value at original scale

var

variance at original scale

sigmaOrig

standard deviation at original scale , can be specified alternatively to the variance

Value

numeric matrix with columns

mu

center parameter (mean at log scale, log(median))

sigma

scale parameter (standard deviation at log scale)

References

Limpert E, Stahel W & Abbt M (2001) Log-normal Distributions across the Sciences: Keys and Clues. Oxford University Press (OUP) 51, 341, 10.1641/0006-3568(2001)051[0341:lndats]2.0.co;2

Examples

# NOT RUN {
.mean <- 1
.var <- c(1.3,2)^2
getParmsLognormForMoments(.mean, .var)
# }