| NChisquare {base} | R Documentation |
These functions provide information about the non-central chi-square
distribution with df degrees of freedom and non-centrality
parameter lambda. dnchisq gives the density,
pnchisq gives the distribution function, qnchisq gives
the quantile function and rnchisq generates random deviates.
The non-central chi-square distribution with df degrees of
freedom and non-centrality parameter \lambda has density
f(x) = e^{-\lambda / 2}
\sum_{r=0}^\infty \frac{\lambda^r}{2^r r!}
\, \mathrm{pchisq}(x, df + 2r)
for x \ge 0.
dnchisq(x, df, lambda)
pnchisq(q, df, lambda)
qnchisq(p, df, lambda)
rnchisq(n, df, lambda)
dchisq, dgamma.
pnchisq(1, df = 3, lambda = 0) == pchisq(1, df = 3)
pnchisq(1, df = 3, lambda = 0:4)