Displaying 20 results from an estimated 700 matches similar to: "homals-0.9.0"
2007 Dec 23
0
anacor: yet another ca package
anacor-0.9.0 is on CRAN (by De Leeuw and Mair)
anacor does correspondence analysis and canonical correspondence
analysis. It can make row plots, column plots,
joint plots, Benz?cri plots, regression plots,
and transformation plots. Where appropriate, plots can
be in 3d using either rgl or scatterplot3d. Row and
column points can be in standard scaling, Benz?cri
scaling, Goodman scaling,
2007 Dec 23
0
anacor: yet another ca package
anacor-0.9.0 is on CRAN (by De Leeuw and Mair)
anacor does correspondence analysis and canonical correspondence
analysis. It can make row plots, column plots,
joint plots, Benz?cri plots, regression plots,
and transformation plots. Where appropriate, plots can
be in 3d using either rgl or scatterplot3d. Row and
column points can be in standard scaling, Benz?cri
scaling, Goodman scaling,
2009 Sep 19
0
homals package and core loop
The homals package
http://www.jstatsoft.org/v31/i04
will get a major programming overhaul. This will take some time,
but what's a few years on a 40-year project. Suggestions
from the audience are welcome.
homals() has a core loop over the m variables in which
1. tapply is used to compute category quantification (centroids)
2. category quantifications are then adjusted to satisfy the
2009 Sep 19
0
homals package and core loop
The homals package
http://www.jstatsoft.org/v31/i04
will get a major programming overhaul. This will take some time,
but what's a few years on a 40-year project. Suggestions
from the audience are welcome.
homals() has a core loop over the m variables in which
1. tapply is used to compute category quantification (centroids)
2. category quantifications are then adjusted to satisfy the
2001 Nov 05
2
Item Response Analysis
Hello,
Would someone have ever heard or developed any Item Response Models library
for R ? Of course, a Rasch model can be estimated through glm() but it is not
the case for more complex (polytomous) response models.
Similarly I would be interested in any R implementation of nonlinear
multivariate analyses a la GIFI (HOMALS, PRINCALS, OVERALS).
Thanks a lot in advance,
Yvonnick Noel, PhD.
2005 Nov 26
0
correspondence analysis and canonical correspondence analysis in R
http://www.cuddyvalley.org/psychoR/code
now contains version 1.4 of ca.R
There are already many versions of CA and CCA in various R packages,
but this one has some unique features, so maybe it is useful.
The function ca() can do simple CA, but it also
allows for linear restrictions on the row and column scores (they
can be restricted to be in the span of a number of covariates). Thus
the
2006 Apr 18
0
scalassoc package
Many new things at
http://www.cuddyvalley.org/psychoR/
The scalassoc package, which fits exponential distance association
models
to indicator matrices, it now at version 1.0.0. It seems to be robust
and
can analyze large examples easily. It is a major improvement (in
speed and
robustness) over the distassoc package, which is at the same site.
scalassoc does something neat (if you like
2008 Mar 27
1
functions
I wrote some functions for multiway CANDECOMP, i.e. for least
squares fitting of
a_{i_1\cdots i_m}\approx\sum_{s=1}^p x^1_{i_1s}x^1_{i_1s}\cdots
x^m_{i_ms}
with arrays of arbitrary dimension. Reminded me of the good old APL
days. I could not find this in the archives, but if it's already there,
I would appreciate if someone let me know.
2005 Nov 06
0
R for Psychometrics
Over the last couple of years I have written quite a few
R programs for various "psychometric" techniques, and I am
regularly updating and expanding what is there. I now
have (wholly or partially), or have planned
-- gifi package (update to homals on CRAN). Code for
multiple correspondence analysis, nonlinear principal
component analysis, nonlinear multiset canonical
2007 Dec 16
0
not a package (yet): derivatives of generalized eigen/singular pairs
but maybe of use to some:
http://gifi.stat.ucla.edu/psychoR/derivatives
Computes generalized eigenvalue solutions Ax=\lambda Bx
and generalized singular value solutions Rz=\gamma Px
and R'x=\gamma Qy for matrices that are differentiable
functions of a vector of parameters. Along with the
decomposition the code returns arrays with all first-order
partial derivatives of the values/vector wrt
2004 Jul 02
0
(PR#7045) Re: homals: Error in y[g[i, j], ] : incorrect number
Function homals() is not part of R. It appears to be in a contributed
package `homals', but you did not say so.
To quote the FAQ
Bug reports on contributed packages should be sent first to the package
maintainer, and only submitted to the R-bugs repository by package
maintainers, mentioning the package in the subject line.
I have closed this bug report on R-bugs.
On Fri, 2 Jul
2008 Dec 11
0
Fwd: Jacobi Plane Rotations in R
http://idisk.mac.com/jdeleeuw-Public/jacobi
This is paper/software for various techniques based on Jacobi plane
rotations.
There is R code for
-- classical cyclical Jacobi Eigen diagonalization
-- Jacobi-based SVD diagonalization
-- approximate simultaneous diagonalization of symmetric matrices (De
Leeuw/Pruzansky 1978)
-- approximate simultaneous diagonalization of rectangular matrices
2007 Feb 03
1
JSS Volume 18 (www.jstatsoft.org)
Special Volume on Spectroscopy and Chemometrics in R
Guest Edited by Katharine M. Mullen and Ivo H.M. van Stokkum
11 contributions, with software packages and examples
Similar volumes on R in Psychometrics (guest edited by
Jan de Leeuw) and R in Political Methodology (guest edited
by Micah Altman and Simon Jackman) are close to being finished.
Additional volumes are being worked on. Proposals
2011 Oct 07
1
Strange behaviour with the Homals Package
Dear R users and experts,
I am using Homals to perform categorical PCA on some survey data. The
documentation is a bit obscure, however, I followed the examples.
X is a matrix with ordinal 1-5 Likert scale entries on 24 questions from
about 2500 respondents.
So I run
X.nlpc = homals(X, rank = 1, level = "ordinal", ndim = 10)
to get the first 10 pc's (the number of dimensions is
2011 Oct 08
0
Strange behaviour with Homals
Dear R users and experts,
I am using the package Homals to perform categorical PCA on some survey
data. The documentation is a bit obscure, however, I followed the examples.
X is a matrix with ordinal 1-5 Likert scale entries on 24 questions from
about 2500 respondents.
So I run
X.nlpc = homals(X, rank = 1, level = "ordinal", ndim = 10)
to get the first 10 pc's (the number of
2007 Sep 11
1
what am I missing
x<-seq(-1,1,length=10)
y<-seq(-1,1,length=10)
a<-matrix(c(1,2,2,1),2,2)
b<-matrix(c(2,1,1,2),2,2)
fv<-function(x,y) {
m<-x*a+y*b
t<-m[1,1]+m[2,2]; d<-m[1,1]*m[2,2]-m[1,2]^2
return((t-sqrt(t^2-4*d))/2)
}
gv<-function(x,y) {
t<-x*(a[1,1]+a[2,2])+y*(b[1,1]+b[2,2])
d<-(x*a[1,1]+y*b[1,1])*(x*a[2,2]+y*b[2,2])-(x*a[1,2]+y*b[1,2])^2
return((t-sqrt(t^2-4*d))/2)
}
2011 Apr 03
0
Homals package color function problem
Hello
The Homals package and its plot options are excellent. However, I am unable
to manipulate the colour in the plots.
In a call such as:
plot(mc_analysis, plot.dim = c(1,3), plot.type = "jointplot", col = 1)
this should be straightforward - but I can't seem to effect the plotted
colours
I have tried various combinations for "col" commands in other plot packages
I
2002 Oct 10
4
Correspondence analysis/optimal scaling with ordinal variable
Dear R specialists,
I have a multivariate statistics question that I want to submit to
the R community (which conveys a very good statistical knowledge).
I need to perform an optimal scaling based on a discrete variable and
an ordinal variable. The discrete variable, Area, defines a
geographical area. The ordinal variable, EducationLevel, describes
the education level of individuals (the
2003 May 13
3
homals for win32?
Hi All
is there "homals" package prepared for win32?
kind regards,
Valery A.Khamenya
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Bioinformatics Department
BioVisioN AG, Hannover
2007 Feb 10
1
SAS, SPSS Product Comparison Table
Hi All,
My paper "R for SAS and SPSS Users" received a bit more of a reaction
than I expected. I posted the link
(http://oit.utk.edu/scc/RforSAS&SPSSusers.pdf) about 12 days ago on
R-help and the equivalent SAS and SPSS lists. Since then people have
downloaded it 5,503 times and I've gotten lots of questions along the
lines of, "Surely R can't do for free what [fill in