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Format: VoseNCF(n1,n2,NcP,
U)
If ChiSq(n1,d) is a non-central chi-squared random variable (with d=NcP) and ChiSq(n2) a chi-squared independent of the first, then
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follows a non-central F distribution.

Kotz et. al (1995) provide a thorough explanation of its origin and uses.
VoseNCF generates values from this distribution or calculates a percentile
VoseNCFObject constructs a distribution object for this distribution
VoseNCFFProb returns the probability density or cumulative distribution function for this distribution
VoseNCFProb10 returns the log10 of the probability density or cumulative distribution function
VoseNCFFit generates values from this distribution fitted to data, or calculates a percentile from the fitted distribution
VoseNCFFitObject constructs a distribution object of this distribution fitted to data
VoseNCFFitP returns the parameters of this distribution fitted to data