Description Usage Arguments References See Also Examples
Computes the probability density function of the noncentral gamma function:
f(x; α, δ)=∑_{i=0}^∞ \frac{e^{-δ/2}(δ/2)^{i}}{i!}≤ft[\frac{1}{Γ(α+i)}e^{-x} x^{α + i - 1}\right]
where Γ(α) is the central complete gamma function, α>0, δ>0, x≥ 0.
1 | dgammanc(x, alpha, delta)
|
x |
a vector of positive quantiles. |
alpha |
a vector of the noncentral gamma parameter, alpha > 0. |
delta |
a vector of the noncentrality parameter, delta > 0. |
Oliveira, IRC; Ferreira, DF Computing the noncentral gamma distribution, its inverse and the noncentrality parameter. Computational Statistics. Submmited for publications. 2012.
Package homepage: <www.dex.ufla.br/~danielff/r_rsources.html>
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