search for: lindners

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2006 Jun 20
3
Create variables with common values for each group
...0010142 52 40.33 8 10010150 18 32.33 9 10010150 51 32.33 10 10010150 28 32.33 Cheers, and thanks a lot, Stephan Lindner -- ----------------------- Stephan Lindner, Dipl.Vw. 1512 Gilbert Ct., V-17 Ann Arbor, Michigan 48105 U.S.A. Tel.: 001-734-272-2437 E-Mail: lindners at umich.edu "The prevailing ideas of a time were always only the ideas of the ruling class" -- Karl Marx
2009 Aug 15
1
System is computationally singular and scale of covariates
Dear all, I'm running a self-written numerical optimization routine (hazard model) which includes computing the inverse of the outer product of the score. I have been getting the above error message ("System is computationally singular"), and after some tweaking, I realized that these variables have some high numbers and the problem could be circumvented by scaling them down (i.e.
2009 Jan 19
2
Using apply to generate matrix from rows?
Dear all, I have a simple question which I unfortunately do not seem to be able to solve myself. I have a (NxK) matrix and want to generate a new matrix by multiplying each row with itself such that the new matrix has dimension ((N*K)xK) (or better, generate an array with dimension (K,K,N)). I tried apply, but that did not work. Any suggestions? Thanks! Stephan ## Here is a simple
2009 Jun 25
4
Using by() and stacking back sub-data frames to one data frame
Dear all, I have a code where I subset a data frame to match entries within levels of an factor (actually, the full script uses three difference factors do do that). I'm very happy with the precision with which I can work with R, but since I loop over factor levels, and the data frame is big, the process is slow. So I've been trying to speed up the process using by(), but I got stuck at
2003 Jan 03
4
factor analysis (pca): how to get the 'communalities'?
Dear expe-R-ts, I try some test data for a factorAnalysis (resp. pca) in the sense of Prof. Ripley's MASS ? 11.1, p. 330 ff., just to prepare myself for an analysis of my own empirical data using R (instead of SPSS). 1. the data. ## The test data is (from the book of Backhaus et al.: Multivariate ## Analysemethoden. Springer 2000 [9th ed.], p. 300 ff):
2008 Nov 19
2
tapply and any
Dear all, A quick question which I somehow cannto figure out: I want to apply the function "any" to subsets of a dataset in order to create a vector with TRUE/FALSE values, depending on whether a subset has the number 5. I.e., y <- matrix(c(1,2,3,3,4,5,5,6,6,7,5,1,1,3,5,NA,5,1,1,3),ncol=2) > y [,1] [,2] [1,] 1 5 [2,] 2 1 [3,] 3 1 [4,] 3 3 [5,]
2004 Aug 06
2
pull relay problems
i was using multiple ports because that's how i figured i'd have to do it. o, mounting the remote source locally? i'm not familiar with how to do this. i'm also not seeing how to do this in the docs. how would i go about mounting a remote stream? -a.j. On Fri, 27 Apr 2001, Jack Moffitt wrote: > Why are you using multiple ports at all? That's what mountpoints are >
2003 May 11
1
Mac OS X canonically decomposed UTF-16 filenames
Hi. I'd like to find some way for Samba to convert the filenames created by Macintosh OS X into something windows can use. According to their docs: http://developer.apple.com/techpubs/macosx/Essentials/SystemOverview/FileSystem/chapter_9_section_13.html filenames are stored as canonically decomposed Unicode 2.1 in UTF-16 format (a sequence of 16-bit codes) Samba running on a
2004 Aug 06
2
pull relay problems
heya... i'm extremely new to the list (10 minutes), and i have a burnin' question that i was hopin' you folks could help me out with. i'm running beos as an encoder box, with two streams (8000 and 8001) hosted on it. the idea is to use my redhat box to relay those streams to the public using icecast, allowing the be machines cpu cycles to focus solely on encoding. anyway, i
2001 Oct 08
1
Package Install Problem under Win98
Hi, I have tried to install 'tensor' as a new package in these phases: 1. via 'Install package from local Zip-File' in Rgui/Windows98: install.packages("D:/R/_Pakets12MB/tensor.zip", .lib.loc[1], CRAN = NULL) 2. Looking at the library folder, there was now a new entry 'tensor' including some files e.g. \library\tensor\R\tensor.R 3. Then I have done
2009 Mar 30
1
Importing csv file with character values into sqlite3 and subsequent problem in R / RSQLite
Dear all, I'm trying to import a csv file into sqlite3 and from there into R. Everything looks fine exepct that R outputs the character values in an odd fashion: they are shown as "\"CHARACTER\"" instead of "CHARACTER", but only if I show the character variable as a vector. Does someone know why this happens? Below is a sample code. The first part is written in
2006 Jul 04
1
using weights in lrm
...+ h.fin1 + Perhaps someone can help me clearifying the warning messages -- thanks a lot in advance ! Cheers, Stephan -- ----------------------- Stephan Lindner, Dipl.Vw. Doctoral Student in Economics 1512 Gilbert Ct., V-17 Ann Arbor, Michigan 48105 U.S.A. Tel.: 001-734-272-2437 E-Mail: lindners at umich.edu "If I have seen further it is by standing on the shoulders of giants." -- Isaac Newton
2009 Sep 20
1
Computing the sum of cross products of rows of a matrix
Hi everyone, I would like to compute the sum of cross products of rows of a matrix. Does anyone know how to do this without an explicit loop for computational efficiency? Below is a code example. Thanks! Stephan # I.e., if I have a matrix like this x <- matrix(rep(c(1,2,3),3),ncol=3) ## > x ## [,1] [,2] [,3] ## [1,] 1 1 1 ## [2,] 2 2 2 ## [3,] 3 3
2000 Aug 29
1
Samba 2.07 eats Disk-Space!
Hello, we are using SAMBA 2.07 on an SUN Enterprise 10000 Server. Today are 1800 Users connected. After 2-3 Days the /opt Directory is getting full (2GB). After stop samba server, the disk-space is getting free. Data of the Server: Solaris 7 Samba 2.07 installed in /opt/samba 6 Sparc CPU with 400MHz 6 GB RAM Disk Space 1,7 TB Can you help us? ciao Hans-Joerg Lindner
2006 Aug 25
1
dos filemode not working (NT_STATUS_ACCESS_DENIED)
dear all, switching from 3.0.22 to 3.023b, we can't get the parameter "dos filemode" to work (giving members of a group with full control the ability to change the acl's). in previous versions we were using "acl group control" which served well (now marked deprecated). the share section of smb.conf is: [test] comment = testshare path = /media/samba/test public =
2004 Aug 06
0
pull relay problems
One stream should have a mountpoint of /stream1 or something, and the other of /stream2. Then you access a stream like so: http://my.server.com:8000/stream1 or http://my.server.com:8000/stream2 then in the other icecast server, you just: relay pull http://my.server.com:8000/stream1 relay pull http://my.server.com:8000/stream2 that should work. jack. On Fri, Apr 27, 2001 at 03:57:37PM -0700,
2008 Feb 25
3
Whitespace in img src
Hello, markdown (Python implementation) seems to render: ![alternativer text](pfad/und/eine lange/url zum bild.jpg) to <img src="pfad/und/eine" title="lange/url zum bild.jpg" alt="alternativer text"/> breaking the URL at the whitespace. AFAIK whitespaces are ok in URLs so why is it breaking up the URL here? Thanks, Florian -- I'm using an
2004 May 04
6
Runtime Error - abnormal program termination
Hi, I'd like to run a win-prog with Linux but it fails: Runtime Error - abnormal program termination. In the console I get the following infos: fixme:ole:CoCreateInstance no classfactory created for CLSID {48071bd8-a9f0-11d0-954b-00a0c911760e}, hres is 0x80040154 fixme:ole:MSFT_ReadValue BSTR length = -1? fixme:ole:ITypeLibComp_fnBind (L"Now", 10ba25, 0x3, 0x406ef200,
2009 Apr 02
2
Selecting all rows of factors which have at least one positive value?
Dear all, I'm trying to select from a dataframe all rows which correspond to a factor (the id variable) for which there exists at least one positive value of a certain variable. As an example: x <- data.frame(matrix(c(rep(11,4),rep(12,3),rep(13,3),rep(0,3),1,rep(0,4),rep(1,2)),ncol=2)) > x X1 X2 1 11 0 2 11 0 3 11 0 4 11 1 5 12 0 6 12 0 7 12 0 8 13 0 9 13 1 10
2009 Jan 22
2
Converting ddf/dct/sas data definition file to R
Dear all, I was wondering whether anyone knows about a program which converts (part of) a data definition file (such as a .dct file for stata, or .sas file for sas) into an R-script. Here is an example with a .sas file: <-- snipp VALUE HTYPE (default=32) 0 = "Not in household" 1 = "Married couple family household" 2 =