Displaying 20 results from an estimated 9000 matches similar to: "factanal {mva} question"
2008 Sep 09
1
Addendum to wishlist bug report #10931 (factanal) (PR#12754)
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Hi,
on March 10 I filed a wishlist bug report asking for the inclusion of
some changes to factanal() and the associated print method. The changes
were originally proposed by John Fox in 2005; they make print.factanal()
display factor correlations if factanal() is called with rotation =
2012 May 28
3
Factanal fits
Greetings, all:
I am using factanal in R.
When I enter a matrix or a formula, the print method winds up with something like this:
Test of the hypothesis that 6 factors are sufficient.
The chi square statistic is 28.1 on 22 degrees of freedom.
The p-value is 0.172
But when I enter a covmat, the print method winds up with something like this:
The degrees of freedom for the model is 22 and the
2007 May 03
3
factanal AIC?
Dear list members,
Could any expert on factor analysis be so kind to explain how to calculate AIC on the output of factanal. Do I calculate AIC wrong or is factanal$criteria["objective"] not a negative log-likelihood?
Best regards
Jens Oehlschl?gel
The AIC calculated using summary.factanal below don't appear correct to me:
n items factors total.df rest.df model.df
2007 May 03
3
factanal AIC?
Dear list members,
Could any expert on factor analysis be so kind to explain how to calculate AIC on the output of factanal. Do I calculate AIC wrong or is factanal$criteria["objective"] not a negative log-likelihood?
Best regards
Jens Oehlschl?gel
The AIC calculated using summary.factanal below don't appear correct to me:
n items factors total.df rest.df model.df
2006 Feb 24
1
Extracting information from factanal()
Dear list members,
I apologize for putting this (probably) very basic question on the
mailing list. I have scanned through the R website (using search) but
did not found an answer.
(code included below)
A factor matrix is simply extracted (which can then subsequently be
exported using write.table) by FACT$loadings[1:6,].
I would also like to specifically extract and export
2003 May 08
2
Returning the p-value of a factor analysis
Hi there,
Does anyone know how to explicitly refer to the p-value of thet test that
the chosen number of factors is significant in a factor analysis.
It's not in the list of values for the factanal command output yet it is
printed out with the results.
Thanks in advance.
Wayne
Dr Wayne R. Jones
Statistician / Research Analyst
KSS Group plc
St James's Buildings
79 Oxford Street
2003 Jan 20
1
make check for R-1.6.2 on IBM AIX
Dear all,
The 'make check' step fails for the pacakge mva on IBM AIX.
The tail of the Rout log file looks like:
> for(factors in 2:4) print(update(Harman23.FA, factors = factors))
Call:
factanal(factors = factors, covmat = Harman23.cor)
Uniquenesses:
height arm.span forearm lower.leg weight
0.170 0.107 0.166
2005 Jun 26
0
Factor correlations in factanal
Dear R-devel list members,
Ben Fairbank draw it to my attention that factanal() (in the stats package)
doesn't report factor correlations for oblique rotations. Looking at the
source, I see that factanal also doesn't save the factor-transformation
(rotation) matrix from which these correlations can be computed. I've
modified the source, attached below, so that the transformation
2006 Mar 15
3
Help on factanal.fit.mle
Hi
Can anybody please suggest me about the documentation of "factanal.fit.mle()"
(Not factanal()------ searching factanal.fit.mle() in R always leads to
factanal()).
Is there any function for doing principal component factor analysis in R.
Regards
Souvik Bandyopadhyay
JRF,
Dept Of Statistics
Calcutta University
[[alternative HTML version deleted]]
2007 May 31
2
Factor analysis
Hi,
is there any other routine for factor analysis in R then factanal?
Basically I'am interested in another extraction method then the maximum
likelihood method and looking for unweighted least squares.
Thanks in advance
Sigbert Klinke
2007 Jul 09
1
factanal frustration!
Hi.
It seems that nearly every time I try to use factanal I get the following
response:
>faa2db1<-factanal(mretdb1,factors=2,method="mle",control=list(nstart=25))
Error in factanal(mretdb1, factors = 2, method = "mle", control =
list(nstart = 25)) :
unable to optimize from these starting value(s)
>
In the case cited above, mretdb1 is synthetic data created
2001 Feb 09
1
starting values for uniquenesses in factanal()
Dear R-help,
Using R 1.2.1 on Windows98 to run a factor analysis on a 64x150 matrix of
data generated from a simulation model, factanal() reported that it failed
to find a solution. Looking at the factanal code, I see the immediate
condition that triggered the result:
if (best == Inf)
stop("Unable to optimize from these starting value(s)")
So I am sure factanal() is giving
2008 Dec 01
1
factanal question
Dear R users:
I'm wondering if it's possible to get the residual correlation matrix when using factanal.
Since factanal assumes that the errors are normally distributed and independent (provided the factor model fits the data) this would be useful. Of course you would need to submit the data to the function to get the residuals (not just their correlation matrix), but it should be possible
2009 Jan 30
1
Factor Analysis-factanal function
Dear friends,
I'm using R to produce the following Factor Analysis:
> matriz.cor<-hetcor(matrix(as.factor(data), ncol=variables,
byrow=T))$correlations
> factanal(x=data, factors=2, covmat=matriz.cor, scores='regression')
Then the screen output shows the following message:
Error en factanal(x = data, factors = 2, covmat = matrix, :
requested scores without
2012 Feb 06
1
na.action in stats::factanal() must be using formula interface and dataframe input to specify na.action?
hi,
Does factanal() force the user to use the formula interface if they wish to specify an na.action?
v1 <- c(1,1,1,1,1,1,1,1,NA,1,3,3,3,3,3,4,5,6)
v2 <- c(1,2,1,1,1,1,2,1,2,1,3,NA,3,3,3,4,6,5)
v3 <- c(3,3,3,3,3,1,1,1,1,1,1,1,1,1,1,5,4,6)
v4 <- c(3,3,4,NA,3,1,1,2,1,1,1,1,2,NA,1,5,6,4)
v5 <- c(1,1,1,1,1,3,3,3,3,3,1,1,1,1,1,6,4,5)
v6 <- c(1,1,1,2,1,3,3,3,4,3,1,1,1,2,1,6,5,4)
m1
2004 Jul 13
5
Help with factanal and missing values
Hi list,
I'm performing a series of confirmatory factor analysis on different
groupings of items from data collected with questionnaires. There are some
missing values.
For those sets with no missing values I call
factanal(datamatrix,factors=n)
where datamatrix is a table of all observations for the items under
investigation.
This call fails when there are missing values.
help(factanal)
2009 Apr 20
1
factanal error
Hi. I tried running the following code. I don't understand the error.
mydata <- read.table("C:/dataForR/radiology/wordFrequencies.csv",
header=TRUE, sep=",")
> dim(mydata)
[1] 982 924
mydataN<-mydata[,-923]
> dim(mydataN)
[1] 982 923
cor(mydataN)
factanal(mydataN, factors=3)
Error in solve.default(cv) :
Lapack routine dgesv: system is exactly singular
2012 Feb 07
1
na.action in stats::factanal()
> Does factanal() force the user to use the formula interface if they
> wish to specify an na.action?
Short answer: yes.
Long answer: The handling of na.action is a built in part of the formula
processing functions, so it's automatic when dealing with a formula.
There are also downstream effects on predict() and resid() that are
worked out for the formula case, but aren't clear
2006 Aug 11
1
- factanal scores correlated?
Hi,
I wonder why factor scores produced by factanal are correlated, and I'd
appreciate any hints from people that may help me to get a deeper
understanding why that's the case. By the way: I'm a psychologist used
to SPSS, so that question my sound a little silly to your ears.
Here's my minimal example:
***********************************************
v1 <-
2009 Jan 30
3
princomp - varimax - factanal
Hi!
I am trying to analyse with R a database that I have previously analysed
with SPSS.
Steps with SPSS:
Factorial analysis
Extraction options : I select = Principal component analysis
Rotation: varimax
Steps with R:
I have tried it with varimax function with factanal or with princomp...and
the results are different of what I have with SPSS. I think that varimax
function is incorporated in