Displaying 20 results from an estimated 800 matches similar to: "correspondence analysis and canonical correspondence analysis in R"
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
2008 Jun 05
0
smacof package for multidimensional scaling
Dear UserR's,
The smacof package (see also our PsychoR repository on
http://r-forge.r-project.org/projects/psychor/) is uploaded on CRAN.
This package provides the following approaches of multidimensional
scaling (MDS) based on stress minimization by means of majorization
(smacof): - Simple smacof on symmetric dissimilarity matrices
- smacof for rectangular matrices (unfolding models)
-
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
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,
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
2001 Feb 24
0
Canonical Correspondence Analysis in R
I think i mentioned this in private communication a while back, but in
case anyone else cares:
I have a version of canonical correspondence analysis (CCA) coded up in
R. I based it on
Ter Braak and Prentice (1988) Adv. Ecol. Res. 18:271-317,
Ter Braak (1986) Ecol. 67(5):1167-1179, and
Ter Braak (1995) Section 5.9 in Jongman, Ter Braak, and
van Tongeren "Data Analysis in
2001 Feb 17
0
Krebs for R (was Re: canonical correspondence analysis)
R-ecologists:
Anyone wanting to create a Krebs package for R can do so using the
C-source code avalaible at:
ftp://gause.biology.ualberta.ca/pub/jbrzusto/krebs/source.zip
Barry J. Cooke Current mailing address:
Ph.D. Candidate 3971 NW 23 Circle
Environmental Biology and Ecology Gainesville, Florida, USA
Department of Biological Sciences 32605
2007 Jan 18
1
weighted MDS, alscal
Hello!
I need to perform weighted multidimensional scaling analysis(WMDS). I did rsitesearch, googled, but I could find no info on how to perform WMDS using R. In several places they say it is possible with the ALSCAL algorithm, but I could not find the relevant function to carry it out.
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2013 Mar 08
0
analytical strategy for MDS/ smacof /dissimilarity matrix
Dear all,
My data includes almost three thousand people who rank ten categories into
three variables. The simple example below is almost same except I have many
missing values.
x <-
cbind(
sample( LETTERS[1:10] , 3000 , replace = TRUE ) ,
sample( LETTERS[1:10] , 3000 , replace = TRUE ) ,
sample( LETTERS[1:10] , 3000 , replace = TRUE )
)
I try to figure
2009 Jun 06
0
SMACOF joint configuration plot with bread data?
Dear R-helpers,
I have dist class objects for 10 individuals rating the
dissimilarities (on a 100-point scale) of the same 10 faces (analogous
to the bread data). I would like to get an individual differences
scaling jointly for the individual judges and the faces, and plot them
on the same axes.
This is the example:
library(smacof)
data(breakfast)
res.rect<-smacofRect(breakfast,
2001 Nov 06
2
Canonical Correspondence analysis-CoCoAn package
Hi R-users,
I am new to R environment.I want to carry out a
correspondence analysis on a contigency table with 64
columns and 298 observation of Environmental data.In
many cells of the contigency table the frequency is
just the value '1'.
I got the following error.
> CAIV(Eplankton)
Error in if (L[i, j] < 0) return("Table L must contain
non-negative numbers") :
2009 Jun 08
0
SMACOF joint configuration plot with bread data? (Michael Kubovy)
Hi Michael,
with res.uc$conf you'll get the single configurations for each rater.
You can use these to produce the plot you want to have.
Best,
Patrick
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2017 Jul 19
0
Redundancy canonical analysis plot problem in 3D using VEGAN, RGL, SCATTERPLOT3D and SFSMISC
We need to keep the discussion on the list. When I run your code, there are several problems.
strain.data <- read.xlsx("Dee rhiz.xlsx", sheetName ="strain", header = T, row.names = 1)
str(strain.data) # lists 9 columns at the end with all NAs
strain.data1 <- (strain.data, sqrt.dist = TRUE) # this is not a valid R line. I get
Error: unexpected ',' in
2007 Nov 20
1
Canonical Correlation Analysis
Dear Sir/Madam,
This is Animesh working on Canonical
Correlation Analysis ( CCA ) and I am using CCA package in R. I have a doubt
and it may be very basic question. Hope someone will get back to me with
answer. I am trying to follow the documentation of CCA but could not make
out some of the stuffs.
1) I simulated some of the data sets and got the result. I want to
2017 Jul 18
3
Redundancy canonical analysis plot problem in 3D using VEGAN, RGL, SCATTERPLOT3D and SFSMISC
Hello Sir
I am getting problem in plotting in CCA . Could you please help me? I wrote the below command but I don't know why it is taking only first 5 env data rather than all 9.
> strain.data <- read.xlsx("Dee rhiz.xlsx", sheetName="strain", header = T, row.names = 1)
> env.data <- read.xlsx("Dee rhiz.xlsx", sheetName="env", header = T,
2006 Jul 20
2
Correspondence analysis with R -follow up
Hi all,
thank you for your answers; i've tried both cca from vegan library, and
dudi.coa from ade4 library; one last question: my deal is mainly with
contingency tables, like the one i'm posting here
acciaieria<-c(.41,.02,.44,.04,.09)
laminatoio<-c(.34,.28,.26,.01,.11)
fonderia<-c(.48,.05,.34,.08,.05)
leghe<-c(.45,.19,.25,.03,.08)
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)
}
2007 Oct 18
0
homals-0.9.0
homals-0.9.0 is on CRAN -- by Jan de Leeuw and Patrick Mair
This package implements the methods discussed in Gifi, Nonlinear
Multivariate
Analysis, Wiley, 1990. In the Gifi terminology it covers homals,
princals,
canals, morals, criminals, and overals. The R implementation fills
several
gaps in Gifi, adding multiple ordinal, numerical, and polynomial data
transformations. Differences with
2007 Oct 18
0
homals-0.9.0
homals-0.9.0 is on CRAN -- by Jan de Leeuw and Patrick Mair
This package implements the methods discussed in Gifi, Nonlinear
Multivariate
Analysis, Wiley, 1990. In the Gifi terminology it covers homals,
princals,
canals, morals, criminals, and overals. The R implementation fills
several
gaps in Gifi, adding multiple ordinal, numerical, and polynomial data
transformations. Differences with