You do not need the regions with the double densities near the center
(1/2,1/2), you can use just the parallel 45 degree borders in that
region also.
x-x
|/*\\\|
|---/***\\|
|--/*\|
|-/**/|
hw-function(r){
(3-sqrt(1+8*r))/4
}
x-runif(1000)
y-(x+runif(1000,-hw(0.5),hw(0.5))) %% 1
x and y will have correlation 0.5 and will be uniformly distributed
on the unit interval.
Replacing 0.5 by any nonnegative number r between 0 and 1 will
create correlated uniformly distributed
Date: Mon, 21 Feb 2011 13:03:53 +0100
From: erich.neuwi...@univie.ac.at
To: soren.fau...@biology.au.dk; r-help@r-project.org
Subject: Re: [R] Generating uniformly distributed correlated data.
hw-function(r){
(3-sqrt(1+8*r))/4
}
x-runif
We want to generate a distribution on the unit square with the following
properties
* It is concentrated on a reasonable subset of the square,
and the restricted distribution is uniform on this subset.
* Both marginal distributions are uniform on the unit interval.
* All horizontal and all
Date: Mon, 21 Feb 2011 15:53:26 +0100
From: erich.neuwi...@univie.ac.at
To: marchy...@hotmail.com
CC: soren.fau...@biology.au.dk; r-help@r-project.org
Subject: Re: [R] Generating uniformly distributed correlated data.
We want to generate
uniformly distributed correlated data.
We want to generate a distribution on the unit square with the following
properties
* It is concentrated on a reasonable subset of the square,
and the restricted distribution is uniform on this subset.
* Both marginal distributions are uniform on the unit
On Feb 21, 2011, at 9:53 AM, Erich Neuwirth wrote:
We want to generate a distribution on the unit square with the
following
properties
* It is concentrated on a reasonable subset of the square,
and the restricted distribution is uniform on this subset.
* Both marginal distributions are
, 20 Feb 2011 12:36:43 +0100
From: Enrico Schumannenricoschum...@yahoo.de
To: =?iso-8859-1?Q?'S=C3=B8ren_Faurby'?=
soren.fau...@biology.au.dk
Cc:r-help@r-project.org
Subject: Re: [R] Generating uniformly distributed correlated data.
Message-ID:7C892818271C43E08DCFD8277CBD01CB@EnricosPC
-project.org] Im Auftrag von S??ren Faurby
Gesendet: Sonntag, 20. Februar 2011 03:18
An:r-help@r-project.org
Betreff: [R] Generating uniformly distributed correlated data.
I wish to generate a vector of uniformly distributed data
with a defined correlation to another vector
The only
@r-project.org
Betreff: [R] Generating uniformly distributed correlated data.
I wish to generate a vector of uniformly distributed data
with a defined correlation to another vector
The only function I have been able to find doing something
similar is corgen from the library
You may also be interested in the psych package or possibly
mvtBinaryEP. I found these using sos:
library(sos)
tc - findFn('tetrachoric correlation') # 26 matches
tcs - findFn('tetrachoric correlations')#27 matches
tc. - tc|tcs
summary(tc.) # 35 links in 5 pkgs
tc.
All but 3 of
-project.org
Betreff: [R] Generating uniformly distributed correlated data.
I wish to generate a vector of uniformly distributed data
with a defined correlation to another vector
The only function I have been able to find doing something
similar is corgen from the library ecodist
On Sun, Feb 20, 2011 at 12:18 AM, Peter Langfelder
peter.langfel...@gmail.com wrote:
On Sat, Feb 19, 2011 at 6:17 PM, Søren Faurby
soren.fau...@biology.au.dk wrote:
I wish to generate a vector of uniformly distributed data with a defined
correlation to another vector
The only function I
Thanks to everybody for helpfull answers.
In case other people want to generate similar data at one time
The one function I have found without any apparant bias ( such as
extreme clustering of the datapoints along one or both diagonals in
plot(x,y) or a slight bias in the generated
I wish to generate a vector of uniformly distributed data with a
defined correlation to another vector
The only function I have been able to find doing something similar is
corgen from the library ecodist.
The following code generates data with the desired correlation to the
vector x but
On Feb 19, 2011, at 9:17 PM, Søren Faurby wrote:
I wish to generate a vector of uniformly distributed data with a
defined correlation to another vector
The only function I have been able to find doing something similar
is corgen from the library ecodist.
The following code generates
On Sat, Feb 19, 2011 at 6:17 PM, Søren Faurby
soren.fau...@biology.au.dk wrote:
I wish to generate a vector of uniformly distributed data with a defined
correlation to another vector
The only function I have been able to find doing something similar is corgen
from the library ecodist.
The
Hi Soren,
Take a look at http://tolstoy.newcastle.edu.au/R/help/05/07/7741.html
HTH,
Jorge
On Sat, Feb 19, 2011 at 9:17 PM, Søren Faurby wrote:
I wish to generate a vector of uniformly distributed data with a defined
correlation to another vector
The only function I have been able to
18 matches
Mail list logo
