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pi0 (version 1.4-1)

dt.lap: Laplace approximation to the noncentral t-density

Description

Laplace approximation to noncentral t-density

Usage

dt.lap(x, df, ncp = 0, log = FALSE, normalize = c("central", 
      "integral", "none"), ...)

Arguments

x

A numeric vector of quantiles

df

A numeric vector of degrees of freedom

ncp

A numeric vector of noncentrality parameters

log

logical; if TRUE, log densities are returned

normalize

character. If central, the normalization is such that the approxiamtion is exact when ncp=0. If integral, numerical integration is performed such that the density integrate to 1 (not implemented yet). If none, no normalization is performed.

currently not used.

Value

numeric vector of densities

References

Young, G.A. and Smith R.L. 2005. Essentials of statistical inference. Cambridge University Press. Cambridge, UK.

See Also

dt.int2, dt.sad, dt