Displaying 20 results from an estimated 500 matches similar to: "hypergeometric"
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.
2002 Oct 23
1
vectorizing a function
Dear R-xperts
I have just written a little hypergeometric function, included below
[the hypergeometric function crops up when solving a common type of
ODE].
It works fine on single values of the primary argument z, but
vectorizing it is getting confusing.
The best I have come up with so far just tests for z being longer than
1 and if so, uses sapply() recursively. This is fine, except that it
2005 Nov 20
1
use of the 'by' command & converting SPSS ANOVA/GLM syntax into R syntax
I have two questions I would appreciate assistance with:
(1) I believe "by" is the command used to split a file. In the following
example, "mydat" is the dataframe , "group" the variable I want to split
the analysis by & "WK1FREQ,WK2FREQ" the variables
attach(mydat)
by (GROUP)
cor.test (WK1FREQ,WK2FREQ)
I have also tried: (by (GROUP) cor.test
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
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 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
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
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.
2010 Mar 30
1
Multivariate hypergeometric distribution version of phyper()
Dear R Users,
I employed the phyper() function to estimate the likelihood that the
number of genes overlapping between 2 different lists of genes is due to
chance. This appears to work appropriately.
Now i want to try this with 3 lists of genes which phyper() does not
appear to support.
Some googling suggests i can utilize the Multivariate hypergeometric
distribution to achieve this. eg.:
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
2008 Jan 06
3
need help
Hi,
I'm Roslina, PhD student of University of South Australia, Australia
from school Maths and Stats. I use S-Plus before and now has started
using R-package. I used
to analyse rainfall data using julian date. Is there any similar
function that you can suggest to me to be used in R-package? Thank you
so much for your attention and help
[[alternative HTML version deleted]]
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
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:
2003 May 02
1
Does R implement Hypergeometric test?
[This email is either empty or too large to be displayed at this time]
2008 Sep 25
1
What distribution is related to hypergeometric?
I have been reading, in various sources, that a poisson distribution is
related to binomial, extending the idea to include numbers of events in a
given period of time.
In my case, the hypergeometric distribution seems more appropriate, but I
need a temporal dimension to the distribution.
I have weekly samples of two kinds of events: call them A and B. I have a
count of A events. These change
2000 Mar 24
3
quantiles of the hypergeometric distribution (PR#502)
Hello!
I use R-version 1.0.0
To get the 0.95 quantile of the hypergeometric
distribution with the parameters m=45000,n=5000 and
k=600 I use the R-command
> qhyper(0.95,45000,5000,600).
The value obtained is 600. However, the true value
is 552. The latter can be obtained for example by
calling the corresponding distribution function
with the R commands
> x<-540:580
>
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
2002 Feb 07
1
Help with replicating an old SPSS GLM analysis
Greetings.
I'm trying to replicate an analysis I did a few years ago, then in SPSS,
using the SPSS GLM command:
GLM
n_diffpt WITH age_i inc_i join_i work_i educ_i give_i cs_i
eff_i age_a inc_a join_a work_a educ_a give_a cs_a eff_a
/METHOD = SSTYPE(3)
/INTERCEPT = INCLUDE
/PRINT = PARAMETER ETASQ RSSCP GEF
/CRITERIA = ALPHA(.05)
/DESIGN =
age_i*age_a inc_i*inc_a
2023 Nov 02
4
Sum data according to date in sequence
Dear all,
I have this set of data. I would like to sum the EnergykWh according date
sequences.
> head(dt1,20) StationName date time EnergykWh
1 PALO ALTO CA / CAMBRIDGE #1 1/14/2016 12:09 4.680496
2 PALO ALTO CA / CAMBRIDGE #1 1/14/2016 19:50 6.272414
3 PALO ALTO CA / CAMBRIDGE #1 1/14/2016 20:22 1.032782
4 PALO ALTO CA / CAMBRIDGE #1 1/15/2016 8:25 11.004884
5
2023 Nov 03
1
Sum data according to date in sequence
Is this what you are after?
library(tidyverse)
library(lubridate)
input <- structure(list(StationName = c("PALO ALTO CA / CAMBRIDGE #1",
"PALO ALTO CA / CAMBRIDGE #1", "PALO ALTO CA / CAMBRIDGE #1",
"PALO ALTO CA / CAMBRIDGE #1", "PALO ALTO CA / CAMBRIDGE #1",
"PALO ALTO CA / CAMBRIDGE #1", "PALO ALTO CA / CAMBRIDGE