similar to: Multiple match function?

Hi all, I'm currently working with a dataset that has quite a few missing values and after some investigation I figured that multiple imputation is probably the best solution to handle the missing data in my case. I found several references to functions in S-Plus that perform multiple imputation (NORM, CAT, MIX, PAN). Does R have corresponding functions? I searched the archives but was not

Hi all, I was wondering whether it is possible to plot math functions, for example sin, cos or a Gaussian type function, in R, and if so, how to do it. I have been searching through the archives and the R manual but had no luck in finding any hints on how to go about this. Any help is much appreciated! Thanks, Jonck

Hi Apologies in advance if I've missed something obvious. I have read the Sweave manual, the first article in R News, looked at the Help pages, googled Sweave and words like loop, output, files, multiple, done much the same on R site search (in case I missed something on Google) and I couldn't find exactly what I'm after. What I'm trying to do ?---------------------- Make

Hi all, I am running a series of experiments where after manipulating my data I run several clustering algorithms (agnes, diana and a clustering method of my own) on the data. I wanted to determine which clustering method did the best job, so therefore I had defined my own quality measure using two criteria: compactness of the data within the clusters themselves and the amount of seperation

Hi, my doubt is very simple. I'm sure I've seen someone using something like this before, but unfortunatelly my searches in the archives were useless. Well, I have some objects called after a name that has a number attached to it, varying. Let's say I have: > ls poly1 poly2 poly3 poly4 poly5 poly6 ... I would like to access these objects using a for(), in which I could do

Hello everyone, I'm new to this list, so let me introduce myself: my name is Jonck van der Kogel and I am a graduate student at the Erasmus University of Rotterdam. I am currently working on my thesis which is on the use of artificial intelligence for large data-sets. To do an analysis of a certain data-set I want to use Kohonen's SOM algorithm. However, as I understand it, the SOM

Hi all, I am having a bit of trouble with the array structure of R. What I want to do is dynamically add/remove elements to an array. For example: Let's say I have created an array: > myArray <- array(c(3,8), dim=c(1,2)) > myArray [,1] [,2] [1,] 3 8 And I now want to, for example, push an element (5,6) on to this array so it will read: [,1] [,2] [1,] 3 8

Hi all, I have a question about the SOM routine. You can either supply the initial representatives for the lattice yourself or else they are chosen randomly from the dataset. Is it possible to pass the random-seed as an argument somehow, when choosing the random initialisation of the lattice? As it is now, each time I run a SOM on a dataset with the same settings the resulting SOM will still

Hi all, A short while ago I asked a question about multiple imputation and I got several helpful replies, thanks! I have untill now tried to use the packages mice and norm but both give me errors however. mice does not even run to start with and gives me the following error right away: iter imp variable 1 1 Liquidity.ratioError in chol((v + t(v))/2) : the leading minor of order 1 is not

Dear List, I have a problem connecting to a CRAN mirror through a networked computer running Vista Enterprise on a Dell PC. I added http_proxy=http://gannet/ http_proxy_user=ask to the Target in the R shortcut, completed the username and password in the Proxy Authentication window, but get the following warning: Warning message: In open.connection(con, "r") : unable to resolve

Well I thank everybody that helped me get swat working. I am very thankful. Now, though, it seems I have more problems. When I try to join my samba domain, my XP box says "a domain controller for the domain edith could not be contacted." Okay, well, after reading up on things in this list, it seems that I need to create a machine account. I didn't have to on my NT box. When I

Good evening all, I'm running samba 2.2.2a on RedHat 7.2 as a PDC and until today all was well. One of my users upgraded their workstation to Windows Xp pro and although they received a message "Welcome to the domain" when they try to log on they receive the message that the domain comptroller cannot be located to validate their account. The workstation show up in the browse list.

This may be a dumb question, but I've wasted several hours trying to find an answer.... When I do a plot with no parameters set eg: ' >plot(d1)' it comes up with a dark gray background and blue data points. I can modify the data points using '>plot(d1, col = "red")', but I have not been able to modify the background color. '>plot(d1, bg =

Package: xen Version: 4.0.1-2 Severity: normal /proc/uptime shows idle bigger than uptime: dom0: % cat /proc/uptime 518389.91 944378.70 % one domU: % cat /proc/uptime 417536.22 764826.15 % another domU: % cat /proc/uptime 426960.17 795800.89 % This is normal on multicore / ht cpu, but this is old amd: % lscpu Architecture: i686 CPU(s): 1 Thread(s) per core: 1

Package: xen-utils-4.0 Version: 4.0.1~rc3-1 Severity: wishlist Please include pv-grub images in xen-utils or as a seperate package. Pv-grub allows securely booting guest kernels. [0] http://wiki.xensource.com/xenwiki/PvGrub -- System Information: Debian Release: squeeze/sid APT prefers testing APT policy: (500, 'testing') Architecture: amd64 (x86_64) Kernel: Linux

Dear R-list, about one month back I posted here a question/idea that it would be nice to have some list of references of R in use plus some other "marketing" arguments for R to promote it. Thanks for all your responses. I was given useful responses from Armin Roehrl, Jim Lemon, Edith Hodgen, Ko-Kang Kevin Wang, Charles Berry, Martin Maechler, Spencer Graves, Paul Gilbert, Adelchi

After upgrading to xen unstable packages I'm seeing the following problem: skx@itchy:~$ sudo /etc/init.d/xend restart Restarting XEN control daemon: xendTraceback (most recent call last): File "/usr/lib/xen-3.0-unstable-1/bin/xend", line 40, in ? from xen.xend.server import SrvDaemon File "/usr/lib/python2.4/site-packages/xen/xend/server/SrvDaemon.py", line 17,

Hi, I am out of town and will get back to you on the 13th of July. Leo >>> "r-help at stat.math.ethz.ch" 06/27/03 00:32 >>> Send R-help mailing list submissions to r-help at stat.math.ethz.ch To subscribe or unsubscribe via the World Wide Web, visit https://www.stat.math.ethz.ch/mailman/listinfo/r-help or, via email, send a message with subject or body

Dear all, I have two data.frames a and b: i <- c(1,1,2,2,3,3,4,4) x <- c(1,53,7,3,4,23,6,2) a <- data.frame(i,x) and j <- c(1,2,3,4) y <- c(99,88,77,66) b <- data.frame(j,y) So, a looks like this > a i x 1 1 1 53 2 7 2 3 3 4 3 23 4 6 4 2 and b like this > b j y 1 99 2 88 3 77 4 66 Now, I would like to match 'b' to 'a', so

Hi, That sounds simple but I cannot think of a really fast way of getting the following: c(1,1,2,2,3,3,4,4) would give c(1,3,5,7) i.e., a function that returns the indexes of the first occurrences of numbers. Note that numbers may have any order e.g., c(3,4,1,2,1,1,2,3,5), can be very large, and the vectors are also very large (which prohibits any loop). The best I could think of is: tmp =