[Rd] inaccuracy in qbinom with partial argument matching

[Peter Ruckdeschel]

Hi,

I found the following strange effect with
qbinom & partial argument matching

p0 <- pbinom(0, size = 3, prob = 0.25)
qbinom(p0,      size = 3, prob = 0.25)  ## 0 o.k.
qbinom(p0-0.05, size = 3, prob = 0.25)  ## 0 o.k.

## positional matching:
qbinom(p0,             3,        0.25)  ## 0 o.k.

## partial argument matching:
qbinom(p0     , s = 3,    p    = 0.25)  ## 1 ???
qbinom(p0-0.05, s = 3,    p    = 0.25)  ## 1 ???
qbinom(p0-0.06, s = 3,    p    = 0.25)  ## 0 o.K.

Unfortunately I have no I idea how to fix this.

I guess however that this will happen for other
cases as well, but I have not pursued this further.

Best, Peter

platform       i386-pc-mingw32
arch           i386
os             mingw32
system         i386, mingw32
status
major          2
minor          5.0
year           2007
month          04
day            23
svn rev        41293
language       R
version.string R version 2.5.0 (2007-04-23)