similar to: Is robust regression available in R.

Hi, trying to do a robudt regression of a two-way linear model, I keep getting the following error: > lqs(obs ~ y + s -1,method="lms", contrasts=list(s=("contr.sum"))) Error: lqs failed: all the samples were singular Robust regression with M-estimators works (also regular least square fits, of course): rlm.formula(formula = obs ~ y + s - 1, method = "M",

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Hello, I'm trying to do a little rlm of some data that looks like this: UNIT COHORT perdo adjodds 1010 96 0.39890 1.06894 1010 97 0.48113 1.57500 1010 98 0.36328 1.21498 1010 99 0.44391 1.38608 It works fine like this: rlm(perdo ~ COHORT, psi=psisquare) But the problem is that I have about 100 UNITs, and I want to do a

Hello. Is NN for R for Win available? It seemes that there's no NN package in contributed ones. -------------- next part -------------- An HTML attachment was scrubbed... URL: https://stat.ethz.ch/pipermail/r-help/attachments/20010310/6a58939c/attachment.html

Hello. For building REmbeddedPostgres in Omegat project(http://www.omegahat.org/RSPostgres/) requiring PostgresSQL's libs, I've tried to build R1.6.1 on Cygwin following the instruction of http://www.stats.ox.ac.uk/pub/Rtools/ since full-spec PostgresSQL running on Windows can run only on Cygwin environment, However I've got following error messages. make -C front-ends Rpwd

Hi, i. After estimating some coefficients using robust regression with rlm() or lqs(), I wonder if there exist some measures of the goodness-of-fit as those for standard linear model(R2)... or evenly if it's a statistics non-sense to look for since I do not find any mention of that in differents chapters on robust and resistant regression or in severals R documentation (Fox, Ripley and

Hi. Three years ago, I've read the question of availability of SOM library for R using Kohonen's SOM_PAK in this mailing-list. This answer was no availability. And no package dealing with SOM in CRAN. Is this situation same? Could you tell me availability this library? Best Regards.

Hello. I try to create stat sever by IIS 4.0 + ASP + VBScript with R for Win on NT Sever 4.0 SP6a. However VBScript denied redirection input of R script. Do Rwin developers have a plan to add a following function by adding an argument of command line? rterm --script 'r script path & file name' -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi. I've tried to create a polygon with one hole by gpclib using following example script. holepoly <- read.polyfile(system.file("poly-ex/hole-poly.txt", package ="gpclib"), nohole = FALSE) area.poly(holepoly) plot(holepoly,poly.args=list(col="red",border="blue")) And I noticed plot function couldn't draw polygons with holes correctly.

I have data on every grade in all elementary schools in Chicago over 5 years. I would like to estimate a trend over time for each grade in each school. There are 17,600 data all together (about 460 schools, nearly 8 grades each, over 5 years). Is there a not-so-hard way to do this in R (I was thinking of using rlm)? ______________________________________________________________________ Stuart

Your understanding isn't similar to mine. Mine says robust/resistant methods are for data with heavy tails, not heteroscedasticity. The common ways to approach heteroscedasticity are transformation and weighting. The first is easy and usually quite effective for dose-response data. The second is not much harder. Both can be done in R with nls(). Andy From: Quin Wills > > I am

I want to estimate the center of a distribution with lots of outliers in one tail, and thought I would use a function such as S-plus's location.m() with psi.fun=bisquare (as per MASS 3 p. 131). However, R seems not have such a function, so my questions are: 1) Is there an R equivalent to location.m()? 2) Would huber() give me results that are similar (i.e., close enough)? Thanks.

> 3x4 Error: unexpected symbol in "3x4" R has no idea that you equate "x" as multiplication.. use an astrix > 3*4 [1] 12 dominic wrote > > This is basically my code: > > library(MASS) > lmsreg(formula = b0 ~ b1 + b3 + b1xb2, data=mydata) > > b1xb2 is an interaction but it was the centered value for a continuous > variable times a

Hi. I'm looking for the robust M estimates comparable to "location.m" in S-PLUS? Alternatively, I guess I could use > lqs(x~1) But ... is "location.m" in a package? Thanks, M. -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info",

Dear Group, I am having trouble with using rlm on multivariate data sets. When I call rlm I get Error in lm.wfit(x, y, w, method = "qr") : incompatible dimensions lm on the same data sets seem to work well (see code example). Am I doing something wrong? I have already browsed through the forums and google but could not find any related discussions. I use Windows XP and R

I am using "nls" to fit dose-response curves but am not sure how to approach more robust regression in R to get around the problem of the my error showing increased variance with increasing dose. My understanding is that "rlm" or "lqs" would not be a good idea here. 'Fairly new to regression work, so apologies if I'm missing something obvious.

Hi all, Thanks to Dr Paul Murrell in New Zealand to remind me of security consideration. I am releasing version 0.2 with security fix. This version will allow you to add banned R function names in a list. R_PHP_Online is a PHP CGI web interface to run R programs online, with the capability to show graphics online. You can get current version of R_PHP_Online from http://steve-chen.net/R_PHP/

Hi. I've been very interested in your seao & seao-gui package for R. However manuals of seao & seao-gui package for R have doesn't include examples, so I can't understand how to use them. Could you tell me availability of tutorials of them in English. Regards.

Hi. Does anyone know whether CA(Cellular Automata), GA(Genetic Algorithm) or Multi-Agent System is available for R for Win? I've already knowna software for these areas, SWARM or startlogo. But I'd like to link R's function with these methods. -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi. Currently, PotgreSQL binary for Cygwin is included in Cygwin's distribution. It is very stable working on my PC. But RMySQL and RPgSQL are not included in R contrib binaries. R's DB access will be faster by using these library than by RODBC? Please tell me whether will be available of RMySQL and RPgSQL in RWin binaries? Thanks. -------------- next part -------------- An HTML