similar to: (Heuristic?) salient feature selection

Dear all, Please excuse my ignorance, but I am having difficulty with this, and am unable to find help on the website/Google. I have a series of explanatory variables that I am aiming to get parsimony out of. For example, if I have 10 variables, a-j, I am initially looking at the linear relationships amongst them: my.lm1 <- lm(a ~ b+c+d+e+f+g+h+i+j, data=my.data) summary(my.lm1) my.lm2

Is there a UseR! manual in the works for the outstanding Rcmdr? -- Oscar Oscar A. Linares, MD Translational Medicine Unit Bolles Harbor Monroe, Michigan [[alternative HTML version deleted]]

Hi..I am trying to run CHAID in R..I have installed the sofyware Party and trying to use the function ctree() to carry out the analysis. but I am getting the following message Error in terms.default(formula, data = data) : no terms component . I am having some Likert scale variable where I have variables like "Overall satisfaction"(Dependent Variable),"Product quality", Brand

Can I say that RPART is a modified algo of CART and PARTY a modified of CHAID? Thanks. ---- Chua Siang Li Consultant - Operations Research Acceval Pte Ltd Tel: 6297 8740 Email: siang.li.chua at acceval-intl.com Website: www.acceval-intl.com This message and any attachments (the "message"...{{dropped:12}}

I have a large dataset (questionnaire results) of mostly categorical variables. I have tested for dependency between the variables using chi-square test. There are an incomprehensible number of dependencies. I used the chaid() function in the CHAID package to detect interactions and separate out (what I hope to be) the underlying structure of these dependencies for each variable. What typically

Quick disclaimer: I'm new to the list and I'm not sure if I'm sending this to the correct forum. If there is a better place for questions like these, please let me know! Dear R List, I'm interested in modifying a regression tree algorithm to use the difference between a control and a dosed sample as its dependent variable. I was wondering if anyone knew where I could find

Dear R-helpers, I just search if is there something for AID and CHAID in R: one message in this list (last year) without success and no possibility. News about? If "no" let's me know because some friends are looking for thesis and this could be a usefull job. bye -- Daniele Medri

Dear Colleagues, I've been looking for a function that can perform a tree analysis, similar to CHAID or QUEST. The key point is that in this case the variables are not binary but nominal (10 different values), so "tree" (from the tree package) won't work. Does anybody know help? Sincerely, ___________________ Markus Preisetanz Consultant Client Vela GmbH

Quer?a saber si existe alguna funci?n de R para realizar el algoritmo CHAID de ?rbol de clasificaci?n, existen de J48 por ejemplo pero no encuentro nada de este algor?tmo. Muchas gracias y un cordial saludo, Juan -- ========================================================= Juan Antonio Gil Pascual Prof. Titular de M?todos de Investigaci?n en Educaci?n correo: jgil at edu.uned.es web:

Dear Andy and Peter, My apologies for chiming in so late, but I was out of town and just caught up with R-help today (and an impressive amount of material accumulates on R-help in a couple of weeks!). Although I develop the Rcmdr package on a Windows system, I test it under Linux as well -- most recently on Ubuntu 7.04 with R 2.5.0. Curiously, the windows for Rcmdr 1.3-5 look normal to me, as I

Full_Name: Robert A. Weller Version: current OS: Mac OS 10.6 Submission from: (NULL) (129.59.140.86) The gfortran 4.2.4 installer in the Tools section that is supposed to install a Snow Leopard (10.6) version is actually installing version 4.2.1. I am finding that the 4.2.1 compiler installed as issues e.g. in interpreting the -fno-automatic command line switch and also -fdefault-real-8. We

Hi, I don't want to have to downgrade my samba server to disable spoolss. I'm running 2.2.3. (I assume I don't need 2.2.3a since it just fixed an overwrite bug). When I use "disable spoolss = no", I can access my printer \\server\savin just fine. When I use "disable spoolss = yes", I can see my printer (savin) in \\server, but when I access it, I get:

Hi Saurav! On Sun, Jul 12, 2009 at 6:06 PM, Pathak, Saurav<s.pathak08 at imperial.ac.uk> wrote: > I am new to R, I have to do a 2 step Heckman model, my selection equation is > below which I was successful in running but I am unable to proceed further, > > > > I have so far used the following command > > glm(formula = s ~ age + gender + gemedu + gemhinc + es_gdppc +

Could you please let me know how to run chaid in R.     Thanks, Saumyha [[alternative HTML version deleted]]

Hi list, I've used sys & pxelinux now many times, it's really a useful toy. I found esp. syslinux very helpful as it allows to COMPLETELY boot from multiple disks. However, I could never use a 'vanilla' syslinux for that. I'm doomed to use Distributor patched versions, which I don't really like. Why is that? Read on: Well, I can't manage to boot of a 1.44 MB

Hi, I have a problem. I upgraded from samba 2.0.7 to 2.2.3 recently, and one of my 2 printers have driver issues. Whenever I print to SAVIN 2545, I get binary and hieroglyphics, so I assumed that it's driver-related. I can print to our HP8100 just fine. Some machines were still configured with: "\\server\savin", LAN Manager Printer These machines STILL print fine. However, if

Hi., I would like to conduct a CHAID tree analysis - Chi-square Automatic Interaction Detector. >From what I can make out from MASS, tree, rpart, and a quick search it isn't available as a package. Is that correct or have I missed it? Has anyone an available implementation of it? Thanks Stephen Nana Mail <http://mail.nana.co.il> - Get Your Free Personal Outlook 2003 Now

Dear r-devel members, My Rcmdr package "depends" on several other packages (tcltk, grDevices, utils, and car) and "suggests" a number of others (abind, aplpack, colorspace, effects, foreign, grid, Hmisc, lattice, leaps, lmtest, MASS, mgcv, multcomp, nlme, nnet, relimp, rgl, and RODBC). The reason for the distinction is that I don't want all of these packages to load when

WinXP, R 2.10.1 I just updated R, and now have trouble. Perhaps it was the method I used to keep all the packages. I copied all the new packages from 2.10.1 back into the 2.10.0 folder, then copied them and all the others I've previously added from the 2.10.0 folder and pasted them back into 2.10.1's appropriate folder. Is this the source of my troubles? I am trying unsuccessfully to

Just installed Rcmdr on a Linux box. When I exit from both Rcmdr and R together from the regular Rcmdr exit menu, it leaves my xterm with "stty -echo", so that nothing that is typed appears. If I exit only Rcmdr, and then exit R normally, everything is okay (stty echo). Other than that minor irritant, everything seems to work just fine. Linux 2.6.16-gentoo-r3 Athlon 64 X2 3800+ R