set_Parameter: Set Profile- and Grain-Specific Model Parameters.

In sandbox: Probabilistic Numerical Modelling of Sediment Properties

Set Profile- and Grain-Specific Model Parameters.

Description

The function defines one model parameter used to generate a set of virtual grains. A parameter is defined in a probabilistic way, as parametric distribution function. Each parameter of the distribution function can be changed through time using set_Rule.

Usage

set_Parameter(book, parameter, type)

Arguments

book	list object, rule book to be edited.
parameter	character scalar, keyword defining the parameter to be defined. Some parameters can be described by more than one function, see details.
type	character scalar, keyword defining the distribution function used to describe the parameter. See details for available keywords, default is "exact".

Details

The following parameter types are available:

• exact: parameter does not vary at all. No additional parameters needed except for vector value, defining the constant values for corresponding depths.

• uniform: parameter varies following a uniform distribution. The following additional parameter vectors are required: min (minimum) and max (maximum)

• normal: parameter varies following a normal distribution, which is defined by mean and standard deviation

• gamma: parameter varies following a gamma distribution, defined by shape parameter, scale parameter) and offset (defining constant offset of values)

Value

A list object.

Author(s)

Michael Dietze, GFZ Potsdam (Germany)

Examples

## get empty rule book
book_1 <- get_RuleBook(book = "empty")

## set density from default "normal" to "exact"
book_2 <- set_Parameter(book = book_1,
                        parameter = "density",
                        type = "exact")

book_1$density$density_1$type
book_2$density$density_1$type

sandbox documentation built on March 18, 2022, 7:06 p.m.