qtAppr {DPQ} | R Documentation |
Compute quantiles (inverse distribution values) for the non-central t distribution. using Johnson,Kotz,.. p.521, formula (31.26 a) (31.26 b) & (31.26 c)
Note that qt(.., ncp=*)
did not exist yet in 1999, when MM
implemented qtAppr()
.
qtAppr(p, df, ncp, lower.tail = TRUE, log.p = FALSE, method = c("a", "b", "c"))
p |
vector of probabilities. |
df |
degrees of freedom > 0, maybe non-integer. |
ncp |
non-centrality parameter delta; .... |
lower.tail, log.p |
logical, see, e.g., |
method |
a string specifying the approximation method to be used. |
...
Martin Maechler, 6 Feb 1999
qt
.
## TODO