inaccuracy in qbinom with partial argument matching

Petr Savicky · 2007-06-29T09:04:06Z

> > ## 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. > > You use a call that specifies your intentions accurately. This is not > 'partial argument matching': 'p' is an exact match to the first argument > of > > > args(qbinom) > function (p, size, prob, lower.tail = TRUE, log.p = FALSE) > > and th

Petr Savicky

Fri, Jun 29, 2007 2:04 AM

Let me add an explanation, why
  qbinom(p0     , s = 3,    p    = 0.25)
does not produce an error message about missing "prob" argument:
Since "size" and "p" arguments are given, p0 is used for
the third argument and not for the first.

Although the behavior is logical, it may not be immediately clear.
I do not see this case explicitly in FAQ or R-intro.pdf 10.3.

Petr.

Thread (3 messages)

Peter Ruckdeschel inaccuracy in qbinom with partial argument matching Jun 28 Brian Ripley inaccuracy in qbinom with partial argument matching Jun 28 Petr Savicky inaccuracy in qbinom with partial argument matching Jun 29