dvm: Density of some circular distributions

View source: R/dvm.R

Density of some circular distributionsR Documentation

Density of some circular distributions

Description

Density of some circular distributions.

Usage

dvm(x, m, k, rads = FALSE, logden = FALSE)
dspml(x, mu, rads = FALSE, logden = FALSE)
dwrapcauchy(x, m, rho, rads = FALSE, logden = FALSE)
dcircpurka(x, m, a, rads = FALSE, logden = FALSE)
dggvm(x, param, rads = FALSE, logden = FALSE)
dcircbeta(x, m, a, b, rads = FALSE, logden = FALSE)
dcardio(x, m, rho, rads = FALSE, logden = FALSE)

Arguments

x

A vector with circular data.

m

The mean value of the von Mises distribution and of the cardioid, a scalar. This is the median for the circular Purkayastha distribution.

mu

The mean vector, a vector with two values for the "spml".

k

The concentration parameter.

rho

The rho parameter of the wrapped Cauchy distribution.

a

The α parameter of the circular Purkayastha distribution or the α parameter of the circular beta distribution.

b

The β parameter of the circular beta distribution.

param

The vector of parameters of the GGVM distribution as returned by the function ggvm.mle.

rads

If the data are in rads, then this should be TRUE, otherwise FALSE.

logden

If you the logarithm of the density values set this to TRUE.

Details

The density of the von Mises, bivariate projected normal, wrapped Cauchy or the circular Purkayastha distributions is computed.

Value

A vector with the (log) density values of x.

Author(s)

Michail Tsagris

R implementation and documentation: Michail Tsagris mtsagris@uoc.gr

References

Mardia, K. V. and Jupp, P. E. (2000). Directional statistics. Chicester: John Wiley & Sons.

See Also

dkent, rvonmises, desag

Examples

x <- rvonmises(500, m = 2.5, k = 10, rads = TRUE)
mod <- circ.summary(x, rads = TRUE, plot = FALSE)
den <- dvm(x, mod$mesos, mod$kappa, rads = TRUE, logden = TRUE )
mod$loglik
sum(den)

Directional documentation built on Sept. 22, 2022, 9:06 a.m.