Displaying 20 results from an estimated 1000 matches similar to: "Re: [R-SIG-Mac] Bug running pbinom() in R-GUI?"
2005 Feb 11
1
Re: [R-SIG-Mac] Bug running pbinom() in R-GUI?
On Feb 10, 2005, at 7:38 PM, George W. Gilchrist wrote:
> Today I was running a graduate level stats lab using R and we
> encountered a
> major problem while using the current build of the Cocoa GUI:
>
>> From the GUI:
>> system.time(pbinom(80, 1e5, 806/1e6))
> [1] 14.37 4.94 30.29 0.00 0.00
>>
>
>> From the command line on the same machine:
>>
2003 May 01
2
qbeta hang (PR#2894)
Full_Name: Morten Welinder
Version: 1.6.1
OS: Solaris/sparc
Submission from: (NULL) (65.213.85.144)
qbeta(0.1, 1e-8, 0.5, TRUE, FALSE) seems to hang for me.
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
1997 Jul 09
1
R-beta: Problem with `rpois'
There is a problem with `rpois'. It does seem to take care about the
order of the arguments. This is an example:
> rpois(n=1,lambda=2)
[1] 3
> rpois(lambda=2,n=1)
[1] 2 0
It obviously uses the first argument as the number of samples to be
drawn, which is wrong.
I used Version 0.49 Beta (April 23, 1997).
Fredrik
1997 Jul 09
1
R-beta: Problem with `rpois'
There is a problem with `rpois'. It does seem to take care about the
order of the arguments. This is an example:
> rpois(n=1,lambda=2)
[1] 3
> rpois(lambda=2,n=1)
[1] 2 0
It obviously uses the first argument as the number of samples to be
drawn, which is wrong.
I used Version 0.49 Beta (April 23, 1997).
Fredrik
2008 Aug 21
1
pnmath compilation failure; dylib issue?
(1) ...need to speed up a monte-carlo sampling...any suggestions about
how I can get R to use all 8 cores of a mac pro would be most useful
and very appreciated...
(2) spent the last few hours trying to get pnmath to compile under os-
x 10.5.4...
using gcc version 4.2.1 (Apple Inc. build 5553) as downloaded from
CRAN, xcode 3.0...
...xcode 3.1 installed over top of above after
2003 Sep 22
2
PR#2894
>Date: Fri, 2 May 2003 10:03:23 -0400 (EDT)
From: Morten Welinder <welinder@rentec.com>
>To: p.dalgaard@biostat.ku.dk
>CC: r-devel@stat.math.ethz.ch, R-bugs@biostat.ku.dk
>Subject: Re: [Rd] qbeta hang (PR#2894)
>
>Ok, I can confirm that it does not, in fact, loop forever. Just a close
>approximation.
...
>There are lots of other places that worry me with respect to
2020 Mar 26
4
unstable corner of parameter space for qbeta?
I've discovered an infelicity (I guess) in qbeta(): it's not a bug,
since there's a clear warning about lack of convergence of the numerical
algorithm ("full precision may not have been achieved"). I can work
around this, but I'm curious why it happens and whether there's a better
workaround -- it doesn't seem to be in a particularly extreme corner of
parameter
2020 Mar 26
2
unstable corner of parameter space for qbeta?
Despite the need to focus on pbeta, I'm still willing to put in some effort.
But I find it really helps to have 2-3 others involved, since the questions back
and forth keep matters moving forward. Volunteers?
Thanks to Martin for detailed comments.
JN
On 2020-03-26 10:34 a.m., Martin Maechler wrote:
>>>>>> J C Nash
>>>>>> on Thu, 26 Mar 2020
2020 Mar 26
2
unstable corner of parameter space for qbeta?
Given that a number of us are housebound, it might be a good time to try to
improve the approximation. It's not an area where I have much expertise, but in
looking at the qbeta.c code I see a lot of root-finding, where I do have some
background. However, I'm very reluctant to work alone on this, and will ask
interested others to email off-list. If there are others, I'll report back.
2000 Nov 16
2
newbee question
Dear All
Where can I lookup good methods to compute
p from q=bin(m,n)p^n*(1-p)^(m-n) such that
q<=alfa, alfa small. Are there such libs,
code and source in R?
Best Regards
--
Jan Burse SIAM, EAWAG
Scheuchzerstr. 67 ?berlandstr. 133
8006 Z?rich 8600 D?bendorf
tel: +41-1-364 17 66 tel: +41-1-823 55 34
2007 Nov 24
2
how to compute highest density interval?
Suppose i want to compute a 95% highest density for a beta distribution
beta(a,b)
the two end points x1 and x2 shoudl satisfy the following two equations:
pbeta(x1,a,b)-pbeta(x2,a,b)=95%
dbeta(x1,a,b)=dbeta(x2,a,b)
Is there any fast way to compute x1 and x2 in R?
[[alternative HTML version deleted]]
2009 Mar 17
3
R does not compile any more on FreeBSD 8.0-CURRENT
On a recent FreeBSD 8.0-CURRENT (i386) building R (any version) breaks
with the following messages:
----------------------------------------------------------------------
[...snip...]
gcc -std=gnu99 -I. -I../../src/include -I../../src/include
-I/usr/local/include -DHAVE_CONFIG_H -g -O2 -c wilcox.c -o wilcox.o
gcc -std=gnu99 -I. -I../../src/include -I../../src/include
-I/usr/local/include
2009 Oct 07
1
Buglet in qbeta?
Hi,
I sometimes play around with extreme parameters for distributions and
found that qbeta is not always monotone as the following example shows.
I don't know whether this is serious enough to submit a bug report (as
this example is near to the limitations of floating point arithmetic).
Josef
> x <- qbeta((0:100)/100,0.01,5)
> x
[1] 0.000000e+00 1.253990e-201 1.589622e-171
2006 Apr 09
1
make check of R-alpha_2006-04-08_r37675 fails: qbeta
make check of R-alpha_2006-04-08_r37675 fails on Debian GNU/Linux 3.1 running
on an Intel P4 computer.
> version
_
platform i686-pc-linux-gnu
arch i686
os linux-gnu
system i686, linux-gnu
status
2006 Mar 22
4
pbinom( ) function (PR#8700)
Full_Name: Chanseok Park
Version: R 2.2.1
OS: RedHat EL4
Submission from: (NULL) (130.127.112.89)
pbinom(any negative value, size, prob) should be zero.
But I got the following results.
I mean, if a negative value is close to zero, then pbinom() calculate
pbinom(0, size, prob). dbinom() also behaves similarly.
> pbinom( -2.220446e-22, 3,.1)
[1] 0.729
> pbinom( -2.220446e-8, 3,.1)
2012 Aug 20
1
The difference between chisq.test binom.test and pbinom
Hello all,
I am trying to understand the different results I am getting from the
following 3 commands:
chisq.test(c(62,50), p = c(0.512,1-0.512), correct = F) # p-value = 0.3788
binom.test(x=62,n=112, p= 0.512) # p-value = 0.3961
2*(1-pbinom(62,112, .512)) # p-value = 0.329
Well, the binom.test was supposed to be "exact" and give the same results
as the pbinom, while the chisq.test
2007 Aug 16
2
(no subject)
hi,
i'm new to R and i'm trying to port a quattro pro spreadsheet into R. spreadsheets have optional lower and upper limit parameters on the beta distribution function. i would like to know how to incorporate this with R's pbeta function.
thanks in advance,
mara.
____________________________________________________________________________________
Park yourself in front of a
2006 Feb 03
5
pbinom with size argument 0 (PR#8560)
Full_Name: Uffe H?gsbro Thygesen
Version: 2.2.0
OS: linux
Submission from: (NULL) (130.226.135.250)
Hello all.
pbinom(q=0,size=0,prob=0.5)
returns the value NaN. I had expected the result 1. In fact any value for q
seems to give an NaN. Note that
dbinom(x=0,size=0,prob=0.5)
returns the value 1.
Cheers,
Uffe
2004 Oct 22
3
pgamma discontinuity (PR#7307)
Full_Name: Morten Welinder
Version: 2
OS: Solaris/space/gcc2.95.2
Submission from: (NULL) (65.213.85.217)
I changed src/nmath/standalone/test.c to read:
---------------------------------------------------------------------------------
#define MATHLIB_STANDALONE 1
#include <Rmath.h>
#include <stdio.h>
int
main()
{
double x;
for (x = 99990; x <= 100009; x++)
printf