similar to: computing scores from a factor analysis

Hi, Is there any R library/package that calculates tetrachoric correlations from given marginals and Pearson correlations among ordinal variables? Inputs to polychor function in polycor package are either contingency tables or ordinal data themselves. I am looking for something that takes marginal distributions and Pearson correlation as inputs. For example, Y1=(1,2,3) with P(Y1=1)=0.3,

I hope someone here knows the answer to this since it will save me from delving deep into documentation. Based on 22 pairs of vectors, I have noticed that tetrachoric correlation coefficients in stata are almost uniformly higher than those in R, sometimes dramatically so (TCC=.61 in stata, .51 in R; .51 in stata, .39 in R). Stata's estimate is higher than R's in 20 out of 22

About two years ago there was a thread about this which suggested that at that time nobody had these coefficients ready to go. (a) has anyone in the meanwhile programmed them? (b) I think I can see how to do the tetrachoric one with mvtnorm on similar lines to an example on the help page so will try that if nobody else already has (c) looking at the polychoric one makes me realise yet again

Hi there, Am I correct to believe that tetrachoric correlation is a special case of polychoric correlation when there are only two levels to the ordered factor? Thus it should be okay to use hetcor from the polycor package to build a matrix of correlations for binary variables? If this is true, how can one estimate 95% confidence intervals for the correlations? My guess would be mat =

Hi Sorry for the rather long message. I am trying to use the cfa command in the lavaan package to run a CFA however I am unsure over a couple of issues. I have @25 dichotomous variables, 300 observations and an EFA on a training dataset suggests a 3 factor model. After defining the model I use the command fit.dat <- cfa(model.1, data=my.dat, std.lv = T, estimator="WLSMV",

Hi Tetra, This is the way we are currently looking at building our SAMBA file server. The reason why we would like to change the SID on the SAMBA server is so we do not need to change all the existing entries in ldap to be SID + rid. -Byron -- *Byron Bogaert* *IT System Administrator* Wikimedia Foundation Imagine a world in which every single human being can freely share in the sum of all

On 15/12/15 22:27, Tetra wrote: > On 15.12.2015 22:16, Byron Bogaert wrote: >> We need to change the SID on a standalone server because it needs to >> also >> act as a File Server. The authentication comes from LDAP, and we have >> existing entries in LDAP for SID of the domain. Instead of change all >> the >> SID in ldap, we would like to be able to change

All, I'm haveing a bit of trouble getting my head around H.323 and call routing with Gatekeepers, Zones and intra-zone calls - hopefully someone who is more informed in things H.323 will be able to point me in the right direction...? I already have a mature network of Asterisk boxes dotted around the UK and overseas with hundreds of extensions and our own number-plan/dial-plan in the form

Hi all I am using centos 5.2. Samba 3.2.1 as PDC with ldap backend.? Is it possible to acheive windows acls in samba?? My requirement is 1.? In a particular share, a specfied users should be able to modify the created the files like Microsoft word or excel etc. but should not be able to delete or create any new? files in the share ( which is possible in windows NT share) 2. I am able to

Stephan, Ok, I'll re-state the problem... I have two devices that I want to talk to each other: 1. an Asterisk PBX 2. a Damm Cellular TETRAFLEX digital radio system (www.damm.dk) both devices are effectively "gateways" because they have many subscribers behind them. The Damm Cellular system controller is based on Windows-XP Embedded and its sub-systems used the OpenH323

On Wed, 2015-12-16 at 01:35 +0100, Tetra wrote: > We don't need a domain for this system. The PCs used are currently > not > in a domain at all, the Linux PCs will not, the Macs like not, and > there > are even some Windows Home PCs that cannot join a domain. The Samba > servers are just for providing file shares in a way Windows > recognizes. > We don't want

Suppose F(x, y; rho) is the cdf of a bivariate normal distribution, with standardized marginals and correlation parameter rho. For any fixed x and y, I wonder if F(x, y; rho) is a monotone increasing function of rho, i.e., there is a 1 to 1 map from rho to F(x, y; rho). I explored it using the function pmvnorm in package mvtnorm with different x and y. The plot suggests the statement may be true.

hello, i have been using cor.test() for calculating the correlation coefficient and p values for some data. however, since the data consist of two dichotomous sequences (actually just binary data), i understand that simply using the pearson correlation is not sufficient. however, having done a bit of research i found that the tetrachoric correlation is what i am after. found the polycor package

Hi I am using the AMD application in a power dialing. All works well when I use an internal extension but when I try to use an external number, the AMD every times returns non human status. Also the AMDCAUSE returns Total-Time-5500. I am using the default parameters in AMD.CONF. Anybody has some idea? Thanks Sergio -------------- next part -------------- An HTML attachment was

Good Morning, Is it possible to use the R program for a CFA with dichotomous data? Thank you, Kathleen Kathleen Kemp, M.A. Doctoral Clinical Psychology Student, Concentration: Forensic Psychology Drexel University Philadelphia, PA 19104 kk354@drexel.edu [[alternative HTML version deleted]]

A bit late, but you might like to look at http://www.qimr.edu.au/davidD/polyr.R Regarding the original posters queries: You can analyse polychoric correlations as if they were Pearson correlations using standard software (eg sem), and this usually doesn't do too badly, or go to AWLS (Browne) in LISREL etc, or ML analysis of the full multidimensional contingency table using programs such as

Newsgroup members, I appreciate the help on this topic. David Duffy provided a solution (below) that was quite helpful, and came close to what I needed. It did a great job creating two vectors of dichotomous variables with a known correlation (what I referred to as a phi-coefficient). My situation is a bit more complicated and I'm not sure it is easily solved. The problem is that I must

This problem shows up on both Linux and Solaris. I am going to show the logs from a Fedora 2.6.25-14.fc9.i686 machine. We are using 'security = domain' with a Windows 2000 domain controller. We are setting 'password server = starfish2' dispite the fact that the documentation says that this in not necessary as we have found it to be necessary. We are setting 'workgroup =

Adding a section of a debug level 5 log at the end that looks like it might have some usefull information. > This problem shows up on both Linux and Solaris. I am going to show > the logs from a Fedora 2.6.25-14.fc9.i686 machine. > > We are using 'security = domain' with a Windows 2000 domain controller. > We are setting 'password server = starfish2' dispite the

I am running a PCA, but would like to rotate my data and limit the number of factors that are analyzed. I can do this using the "principal" command from the psych package [principal(my.data, nfactors=3,rotate="varimax")], but the issue is that this does not report scores for the Principal Components the way "princomp" does. My question is: Can you get an