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.

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

Examples

# Describe a date as a uniform distribution cql_date("U-Date", cql_u("U", -5000, -4000))
#> // CQL2 generated by stratigraphr v0.3.0.9000 #> Date("U-Date", U("U", -5000, -4000););