EpiNow2 (version 1.3.4)

lognorm_dist_def: Generate a Log Normal Distribution Definition Based on Parameter Estimates

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)

Value

A data.table defining the distribution as used by dist_skel

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.

Author

Sam Abbott

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]]