similar to: remove columns containing all zeros (or other value)

Does anyone know if the sem package in R can implement a stacked model comparison, for example as in LISREL or AMOS? Thanks, Anthony -- Anthony Steven Dick, Ph.D. Post-Doctoral Fellow Human Neuroscience Laboratory Department of Neurology The University of Chicago 5841 S. Maryland Ave. MC-2030 Chicago, IL 60637 Phone: (773)-834-7770 Email: adick at uchicago.edu Web:

Hello- If I input a variance-covariance matrix and specify NA for start values, how does sem determine the start value? Is there a default? Anthony -- Anthony Steven Dick, Ph.D. Post-Doctoral Fellow Human Neuroscience Laboratory Department of Neurology The University of Chicago 5841 S. Maryland Ave. MC-2030 Chicago, IL 60637 Phone: (773)-834-7770 Email: adick at uchicago.edu Web:

Hello all, This is a general stats question--I realize it is an R help list, so tell me to go away if it is inappropriate. I have a 2 X 2 design, and I have specified four identical path models (one for each level of each factor). I want to test for an interaction at each path--essentially (A1 - A2) - (B1 - B2) != 0. I was thinking of computing a contrast for each path of interest, such that

Hello- I am using R to build my initial models, but need to use AMOS to compare the models of two groups (adults vs. kids). The problem is I am getting different results with R and AMOS for the initial models of the separate groups (and the R results make more sense). The parameter estimates (path coefficients and variances) from both programs are nearly identical, but the model chi-squares

Hi all- I am stumped. The code in A. returns errors at lines 14 and 15 and fails to load series1 and series2. However, in B., if temp1 and temp2 are called again (which returns a "Table exists" error; see lines 14-17 in B.) series1 and series2 load correctly. Any ideas? Also-I am open to any suggestions to improve the code as I am a horrific programmer. Thanks A. 1 >

Hello all, I am re-posting my previous question with a simpler, more transparent, commented code. I have been ramming my head against this problem, and I wondered if anyone could lend a hand. I want to make parallel a bootstrap of a linear mixed model on my 8-core mac. Below is the process that I want to make parallel (namely, the boot.out<-boot(dat.res,boot.fun, R = nboot) command).

Hello- I have a script which steps through a series of subjects, and for the subjects I remove outlying values. After removing these outliers, I specify a cutoff, keeping only values over a certain value (e.g., 1.96). I want to populate a matrix with a statistic of the values that make the cutoff (for example, the mean). However, in some subjects, after outliers and the cutoff are specified,

Hello, I have access to my database via command line and through workbench, and have access on the grant tables: mysql> SELECT host,user,password,select_priv,insert_priv FROM user; +------+-------+-------------------------------------------+-------------+-------------+ | host | user | password | select_priv | insert_priv |

People of R(th), I have been ramming my head against this problem, and I wondered if anyone could lend a hand. I want to parallelize a bootstrap of a linear model on my 8-core mac. Below is the process that I want to parallelize (namely, the m2.ph.rlm.boot<-boot(m2.ph,m2.ph.fun, R = nboot) command). This is an extension of the bootstrapping linear models example in Venables and Ripley to

Hi. I have installed samba 3.0.2 in my redhat 7.3, and Kerberos 1.2.4 I can make my Linux act as ADS Domain Membership whit out any problem, When I made this command: /usr/local/samba/bin/net ads join "Computers" -U<usuario>%<clave> I get this message that tell me that everything is ok. Using short domain name -- DOMAIN2003 Joined 'PROTON' to realm

Hi, I posted a few messages a couple of days ago about a strange windows 95 browsing problem with samba-2.0.2, 1.9.17p4 that none of our Windows 95 users can see our Linux shares, but all NT users can see the Linux shares, and all 95 and NT users can see AIX shares. All of our Linux and AIX use the save version of samba (I tested 2.0.2 and 1.9.17p4). Yesterday, I tried to down grade the version

Hello all, I apologize in advance if this is not the correct list to post these sorts of issues. When attempting to install the latest stable build of R (2.6) or the most recent nightly build from R.research.att.com, the installer disables the ability to actually install R or any of the other bundled frameworks (i.e. the list is unchecked and grayed out). Before I start trying to either coerce the

Using Debian Sarge, samba, CUPS, and an HP G85 mutifunction with HPOJ to use the G85 USB connection, I've been able to get raw printing to work, and Point 'n' Print driver download to work, but not at the same time. The driver download was a chore, because of HP's proprietary install program. Had to install the driver locally to get the needed files and copy them manually to the

I've installed Samba 3.0.2 (from the source) on a SuSE 8.2 system with MIT Kerberos 1.3.1 (I uninstalled the Heimdal code) and the OpenLDAP 2.1.27 development libraries installed on it. I want to make this system a domain member of a Win2K native-mode ADS domain but can't get "net ads join" to work. I've run "kinit myid@MYDOMAIN.COM" and I get at ticket, but when

Hi R-Helpers, Sorry to bother you, but I have a simple task that I can't figure out how to do. For example, I have some names in two columns NamesWide<-data.frame(Name1=c("Tom","Dick"),Name2=c("Larry","Curly")) and I simply want to get a single column

Just to repeat: you have NamesWide<-data.frame(Name1=c("Tom","Dick"),Name2=c("Larry","Curly")) and you want NamesLong<-data.frame(Names=c("Tom","Dick","Larry","Curly")) There must be something I am missing, because NamesLong <- data.frame(Names = c(NamesWide$Name1, NamesWide$Name2)) appears to

Hi, You were on the right track using stack(), but you just pass the entire data frame as a single object, not the separate columns: > stack(NamesWide) ? values ? ind 1 ? ?Tom Name1 2 ? Dick Name1 3 ?Larry Name2 4 ?Curly Name2 Note that stack also returns the index (second column of 'ind' values), which tells you which column in the source data frame the stacked values originated

I just put a USB hard drive into service, but find that unless the drive is connected to my PC the machine won't boot and drops to a shell. Below is the line I added to fstab. I thought that the option "noauto" would prevent the machine from trying to mount the drive /dev/sdb /usbdrive ext3 user,noauto,rw 0 2 What am I doing wrong? Any advice is

I may be missing something but using the plain old c() combine function seems to work fine: df <- data.frame(left = 1:5, right = 6:10) df.combined <- data.frame(comb = c(df$left, df$right)) df left right 1 1 6 2 2 7 3 3 8 4 4 9 5 5 10 df.combined comb 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 -----Original

Hi everybody I am trying to get RoR to work with lighttpd. Nearly there, but I am stuck with a strange phenomenon. If I configure lighttpd to serve pages on say port 2000, I can get at my testapp fine and see the "Welcome aboard" page. However, if I configure lighttpd to use port 80, I get a download prompt from my browser. If I access my URI like