lognorm_dist_def: Generate a Log Normal Distribution Definition Based on...

In epiforecasts/EpiNow: Estimate Realtime Case Counts and Time-varying Epidemiological Parameters

Description

Generates a distribution definition when only parameter estimates are available for log normal distributed parameters. See rlnorm for distribution information.

Usage

lognorm_dist_def(mean, mean_sd, sd, sd_sd, max_value, samples, to_log = FALSE)

Arguments

mean	Numeric, log mean parameter of the gamma distribution.
mean_sd	Numeric, standard deviation of the log mean parameter.
sd	Numeric, log sd parameter of the gamma distribution.
sd_sd	Numeric, standard deviation of the log sd parameter.
max_value	Numeric, the maximum value to allow. Defaults to 120. Samples outside of this range are resampled.
samples	Numeric, number of sample distributions to generate.
to_log	Logical, should parameters be logged before use.

Value

A data.table definining the distribution as used by dist_skel

Examples

def <- lognorm_dist_def(mean = 1.621, mean_sd = 0.0640,
                        sd = 0.418, sd_sd = 0.0691,
                        max_value = 20, samples = 10)
               
print(def)

def$params[[1]]

def <- lognorm_dist_def(mean = 5, mean_sd = 1,
                        sd = 3, sd_sd = 1,
                        max_value = 20, samples = 10,
                        to_log = TRUE)
               
print(def)

def$params[[1]]

epiforecasts/EpiNow documentation built on Oct. 26, 2020, 2:38 p.m.