Displaying 5 results from an estimated 5 matches for "pbeta_raw".
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betadraw
2000 Nov 28
1
non-centrality parameter in pf() (PR#752)
Bug Description:
Problem with the function pf() when the non-centrality
parameter is large. Here is a sample command. You should
see a smooth line from 0 to about 55, and then the values
of pf() go crazy from 55 to 100.
############################
ncp <- seq(0,100,length=200)
plot(ncp,pf(5,7,2,ncp=ncp))
############################
Version:
platform = i686-pc-linux-gnu
arch = i686
os =
2005 Feb 11
1
Re: [R-SIG-Mac] Bug running pbinom() in R-GUI?
...t; deliver the same terrible performance. It seems as if this only occurs
> for
> certain arguments, but we saw this on ~15 different machines today.
> And it
> seems to only be when running the Cocoa GUI. No problems at all with
> this
> under Windoze. Any ideas?
The cause is pbeta_raw calling (indirectly via R_CheckUserInterrupt)
R_ProcessEvents for every iteration - and for small p the number of
iterations goes really high (e.g. for the case above n=99919).
R_ProcessEvents is not a cheap operation, because it enters system
event loop and processes any pending events. A quic...
2002 Jul 25
4
src/nmath/pgeom.c (PR#1834)
Full_Name: Morten Welinder
Version: 1.5.1
OS: Solaris/Linux
Submission from: (NULL) (192.5.35.38)
The line
return log(1 - p) * (x + 1);
looks like it has problems for p near 1. I would suggest rewriting it to
return log1p (-p) * (x + 1);
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r-devel mailing list -- Read
2001 Dec 09
1
error in qbeta (PR#1201)
Full_Name: Ziheng Yang
Version: 1.3.1
OS: Windows 98
Submission from: (NULL) (172.136.54.89)
I noticed that qbeta is sometimes wrong and the error is not even due to the
beta parameters being too extreme. I am calculating the quantiles corresponding
to cdf = 0.05, 0.15, ..., 0.95. The value corresponding to cdf=0.25 is wrong
while all other values are correct.
qbeta(0.05, 0.143891, 0.05) =
2002 Jan 07
3
qbeta function (FYI, compiler bug)
Hi there,
this is just to let you know that the qbeta function, which was
copied from R into Gnumeric, has been confirmed to be miscompiled
by gcc 2.96 on Linux. (That's Red Hat's compiler.)
This shows by qbeta(0.025,4,0.5) ending up taking the wrong
branch of "if (alpha <= 0.5)".
We compile things in a different context, so this may or may not
affect you. The qbeta