Displaying 20 results from an estimated 100 matches similar to: "Question regarding hypergeometric 2f1 function"
2002 Aug 13
8
Document R sourcecode with Tex
Hi,
I'm actually afraid that this is a RTFM question - I read the manual but
didn't find anything yet... I'm looking for a way to document R sourcecode
in my thesis. Does anyone know of a tool or function which can convert or
export R sourcecode to Tex?
Thanks for any hints!
Best Regards,
Daniel
2002 Aug 23
2
Surprising result from integrate
Hi all,
sorry for this extensive question, but I think that I'm missing something
fundamental.
I stepped into a surprising result with the integrate function and I would
be glad if someone could put some light onto this. I try to integrate over
an s-shaped growth-function. The results from this calculation seem to be
correct for small values of t. Just for fun I tried some large values and
2001 Nov 08
1
buildpkg.sh scripts problem
Hello Ben Lindstrom,
I tried your package creation scripts for Solaris which are contributed with
the new OpenSSH Version 3.0.0p1.
Nice that you develop these scripts but I run into a major problem
installing the package which was created by the script.
On our Solaris hosts /usr/local is only a symbolic link to /opt/local. After
installing the OpenSSH package the symbolic link was removed and a
2004 Jun 30
1
AS_NUMERIC and as.numeric - Could someone explain?
Dear List,
I stepped into a strange effect which I can't explain to myself
(probably due to lack of knowledge on R internals).
I have four vectors a,b,c and z of size 10000 each. With these vectors I
call
.Call("hyp2f1forrey", a, b, b, z, PACKAGE = "hyp2f1")
to access
SEXP hyp2f1forrey(SEXP a, SEXP b, SEXP c, SEXP x)
{
int i,n;
double *xa, *xb, *xc, *xx,
2007 Feb 05
0
Generalized hypergeometric function 2F1
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2008 Dec 03
1
hypergeometric
Hi,
I hope somebody can help me on how to use the hypergeometric function.
I did read through the R documentation on hypergeometric but not really
sure what it means.
I would like to evaluate the hypergeometric function as follows:
F((2*alpha+1)/2, (2*alpha+2)/2 , alpha+1/2, betasq/etasq).
I'm not sure which function should be used- either phyper or qhyper or
dhyper
Where
2010 Jun 08
1
hypergeometric series in R
Hello.
Somebody knows how to compute generalized hypergeometric series in R?
(see
http://functions.wolfram.com/HypergeometricFunctions/HypergeometricPFQ/02/
to understand what I mean)
Thanks in advance,
Arnau.
2003 May 02
1
Does R implement Hypergeometric test?
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2008 Jan 15
0
FDR for hypergeometric tests
Dear list,
I have performed several tests for the hypergeometric distribution
using phyper() for some gene annotation categories as follows
>phyper(26,830,31042,337, lower.tail=F)
>phyper(16,387,31042,337, lower.tail=F)
.
.
.
I am only running some selected categories but I would like to correct
this value for multiple testing since I
have 3121 possible tests according to 3121
2011 Aug 31
0
Fitting the negative hypergeometric distribution
I'd like to fit the (1-displaced) negative hypergeometric distribution
to data samples such as the following:-
x <- c(370, 311, 299, 266, 265, 232, 197, 198, 170, 154, 133, 123, 120,
103, 80, 72, 69, 67, 67, 50, 36, 35, 26, 23, 15, 11, 9, 6, 5, 3, 3, 2,
2, 2)
i.e., I want to estimate the parameter values of K and M (with my data,
n would usually be the same as the length of the data
1998 Feb 23
0
R-beta: Hypergeometric Probabilities
In both versions of R to which I currently have access (R-0.16.1 and
R-0.61.1), "phyper" stops returning correct cumulative probabilities as the
parameters of the hypergeometric distribution get large. For example, when
N1=1345, N2=1055, and n=1330, phyper returns either 0 or 1, and nothing in
between.
Looking at phyper.c, it's clear what's happening. First a term (called
1997 May 12
1
R-alpha: Hypergeometric Distribution
A cut and paste typo has crept in and is rendering all values returned
for the hypergeometric distribution incorrect. The problem is in
src/main/arithmetic.c in the function "math4". The lines
PROTECT(sy = allocVector(REALSXP, n));
a = REAL(sa);
b = REAL(sb);
c = REAL(sc);
d = REAL(sc); /* <-- change this line */
y = REAL(sy);
should
2001 Sep 08
0
R-function available for noncentral hypergeometric distribution
For those who are interested, I have made available a R function for
noncentral hypergeometric distribution at
http://www.geocities.com/jg_liao/software/Hypergeometric/hypergeometric_in_R.txt
The paper that describes the algorithm will appear in The American
Statistician.
The function does not run on S-plus as the R's scoping rule is used.
Here is how the function can be used:
> n1
2008 Feb 07
1
Appell Hypergeometric function
Dear All,
I am looking for an implementation in R of the Appell Hypergeometric
function.
Any suggestions will be more than appreciated!
GP
--
dr. Giovanni Parrinello
External Lecturer
Medical Statistics Unit
Department of Biomedical Sciences
Viale Europa, 11 - 25123 Brescia Italy
Tel: +390303717528
Fax: +390303717488
email: parrinel at med.unibs.it
2010 Aug 13
1
hypergeometric vs fisher.test
Dear R team,
I have a simple question.
I tried this command:
phyper(17,449,19551,181, FALSE)
[1] 1.47295e-07
and then I tried this command:
(fisher.test(matrix(c(17,449,181,19551),2,2),
alternative='greater'))$p.value
[1] 3.693347e-06
Shouldn't be identical the results of the two commands ?
What is the difference ?
Thx a lot
--
View this message in context:
2008 Sep 10
1
A question about the hypergeometric distribution and phyper()
Dear All
I have a question about the hypergeomteric distribution.
Example 1: I have a universe of 6187 objects, and 164 have a particular
attribute, therefore 6187-164 do not have that attribute. I sample 249
of those objects, and find that 19 have that attribute. I get a p-value
here (looking at just over-representation):
phyper(19, 164, 6187-164, 249, lower.tail=FALSE)
[1] 7.816235e-06
2005 Sep 19
3
Extended Hypergeometric Distribution
Dear R Users,
There exists a non-central hypergeometric distribution function in the (MCMCpack) package, and a hypergeometric distribution function in the (stats) package.
Is there a function for sampling from an extended hypergeometric distribution?
Thanks,
Narcyz
This message is intended for the addressee named and may con...{{dropped}}
2012 Mar 19
2
hypergeometric function in ‘ mvtnorm’
Is there any way to know how the "dmvt" function computes the hypergeometric
function needed in the calculation for the density of multivariate t
distribution?
--
View this message in context: http://r.789695.n4.nabble.com/hypergeometric-function-in-mvtnorm-tp4483730p4483730.html
Sent from the R help mailing list archive at Nabble.com.
2012 Oct 01
1
Retrieve hypergeometric results in large scale
I'm going to use
dhyper(x, m, n, k)
to get a 95% coverage. Let me use an example to explain my problem:
Suppose I have a urn containing 90 red and 10 black balls.
Now I wanna remove 3 from the urn. By the following codes:
m<-90;n<-10;k<-3;
x<-0:3
dhyper(x,m,n,k)
I can obtain the probability that 0,1,2,3 red balls will be removed.
0.000742115 0.025046382 0.247680891
2003 Oct 01
1
hypergeometric & population estimates
"help"
We want to estimate the number of caribou in Jasper. We recently conducted
an aerial survey and saw 70 uncollared caribou and 8 of 11 collared
caribou. We want to estimate the number of caribou in this population with
95% confidence limits. Gary White uses the hypergeometric distribution and
determines the population estimates using maximum likelihood and 95%CL as