Dear All,
Thank You for the quick responses.
Managed to solve my problem through:
http://www.faculty.biol.ttu.edu/strauss/multivar/R/SamplePCABootstrap.R.txt
or
http://r.789695.n4.nabble.com/bootstrapped-eigenvector-method-following-prcomp-td877655.html
Used the first one however, code is too long since everything is
manually done.
The suggestion of Bill would be very kind and save a lot of time in
the future.
Thanks William for clearing this up.
Cheers
Efi
Zitat von William Revelle <li...@revelle.net>:
psych does not currently have bootstrapped confidence intervals for
loadings. That is a reasonable request and I will try to add it,
perhaps in the “real soon now” version of 1.5.4 (almost finished),
perhaps in the next release,
Bill
On Apr 13, 2015, at 2:38 PM, stephen sefick <ssef...@gmail.com> wrote:
Hi,
Please search the mailing list archives for this, or type bootstrapped PCA
R into google. Please provide a minimal self-contained example of what you
are trying to solve. Please read the posting guide that is referenced at
the end of every email.
kind regards,
Stephen
On Mon, Apr 13, 2015 at 11:07 AM, Efstathia Defteraiou <
efstathia.deftera...@student.uibk.ac.at> wrote:
Dear All,
I am relatively new in R.
Im working with the 'psych' package and 'principal' function.
I would like to know how to generate the bootstraped conf.intervals for
loadings,
looking for sth similar to setting 'n.iter' argument for the 'fa' function.
If in 'psych' can't work and suggest me the 'boot' package please provide
specific Rscript since I don't understand the commands and arguments that
have to be used before calling the function 'boot'( what are indices? what
to define as what inside function(){})
The names Im using are included in the following code:
'newdata3.1' is my data and provided as data.frame
makingtheanalysis3.1 <-principal(newdata3.1, nfactors =3,
residuals = FALSE,
covar=FALSE,rotate="varimax",scores=TRUE)
I am sorry for not providing a specific code but my data are too large
Any Help appreciated
Cheers!
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--
Stephen Sefick
**************************************************
Auburn University
Biological Sciences
331 Funchess Hall
Auburn, Alabama
36849
**************************************************
sas0...@auburn.edu
http://www.auburn.edu/~sas0025
**************************************************
Let's not spend our time and resources thinking about things that are so
little or so large that all they really do for us is puff us up and make us
feel like gods. We are mammals, and have not exhausted the annoying little
problems of being mammals.
-K. Mullis
"A big computer, a complex algorithm and a long time does not equal
science."
-Robert Gentleman
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and provide commented, minimal, self-contained, reproducible code.
William Revelle http://personality-project.org/revelle.html
Professor http://personality-project.org
Department of Psychology http://www.wcas.northwestern.edu/psych/
Northwestern University http://www.northwestern.edu/
Use R for psychology http://personality-project.org/r
It is 3 minutes to midnight http://www.thebulletin.org
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