cql_n: Describe distributions in CQL

In joeroe/stratigraphr: Archaeological Stratigraphy and Chronological Sequences

Describe distributions in CQL

Description

The CQL commands N, LnN, T, U and Top_Hat describe various types of probability distribution functions. cql_n() defines a normal distribution by its mean and standard deviation; cql_lnn() a log–normal distribution by its mean and standard deviation; cql_t() a Student's t distribution by degrees of freedom; cql_u() a uniform distribution by its start and end; cql_top_hat() a uniform distribution by its central point and width.

Usage

cql_n(name, mu, sigma, resolution = NULL)

cql_lnn(name, mu, sigma, resolution = NULL)

cql_t(name, freedom, scale = 1, resolution = NULL)

cql_top_hat(name, mid, half_width)

cql_u(name, from, to, resolution = NULL)

Arguments

name	Character. Label for the distribution.
mu	Integer. Mean of a normal or log–normal distribution.
sigma	Integer. Standard deviation of a normal or log–normal distribution.
resolution	Integer. Resolution of the PDF. Leave NULL (the default) to use the OxCal default.
freedom	Integer. Degrees of freedom of a Student's t distribution.
scale	Numeric. Optional scaling parameter for a Student's t distribution.
mid	Integer. Centre point of a uniform distribution.
half_width	Integer. Half-width of a uniform distribution.
from	Integer. Start point of a uniform distribution.
to	Integer. End point of a uniform distribution.

Value

A cql object.

References

https://c14.arch.ox.ac.uk/oxcalhelp/hlp_analysis_inform.html#param

https://c14.arch.ox.ac.uk/oxcalhelp/hlp_commands.html

See Also

Other CQL functions: cql_boundary(), cql_options(), cql_other, cql_phase(), cql_r_date(), cql_sequence(), cql(), write_oxcal()

Examples

# Describe a date as a uniform distribution
cql_date("U-Date", cql_u("U", -5000, -4000))

joeroe/stratigraphr documentation built on May 17, 2023, 9:52 p.m.