similar to: 3 questions

Hello everybody, I've been practicing with some data in R and SPSS and I noticed that there are some differences in ANOVA results. For example with : y<-c(1,2,34,2,3,45,2,1,67,3,2,67,2,2,98,4,4,23,1,1,23,2,3,45) and x<-rep(c(1,2,3),8) I get in R ( with summary(aov(y~x)) ) MSres=350.7 df=22 while in SPSS I get MSres=221.9 df=21 Can enyone explain me what is the problem or

Hello everybody, Can anyone tell me how I could analyze data that are at a contigency table form? I already found function cfa in the cfa package but I still don't understand how I could use this function in order to elaborate a contigency table. Every answer is welcome! --------------------------------- ÁðïêôÞóôå ôçí äùñåÜí óáò@yahoo.gr [[alternative HTML version deleted]]

Hello, I have 4 questions in R and I am looking for 4 answers! the questions are the below: 1) is there a function in R for the Least Significant Difference method for multiple comparisons? 2) Is there a function in R that gives me the studentized deleted residuals and the leverage points? 3) is there a way that I could create a link in a program of mine, so as to select an option when my program

Dear R users: 1. Is there a function which fits to the data the t-student distribution with parameters mu, sigma, nu. Is the function fitdistr of MASS with the syntax fitdistr(x, "t") appropriate for this? 2. Is there a function which can fit the exponential power distribution? Thanks. --------------------------------- ÁðïêôÞóôå ôçí äùñåÜí óáò@yahoo.gr [[alternative

Could anyone tell me what am I doing wrong? > pro<-function(indep,dep){ + d<-data.frame(indep) + form<-formula(lm(dep~.,data=d)) + forward<-step(lm(dep~X1,data=d),scope=form,trace=0,direction='f') + return(forward) + } > pro(m,q) Error in inherits(x, "data.frame") : Object "d" not found Where q is a vector with the dependent variable's

Hi I am looking for an implementation (or alternative to) Mallow's distance or the Earth Mover's distance to compare distributions or unnormalized distributions (signatures). Is there an implementation in R or can somebody recommend an alternative? Thanks Rainer -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) Centre of

Dear all I am supposed to use Mallow's Cp creterion to select a model which require a "leaps" package. the version right now I am using is R 1.7.1(os:windows), the "leaps" package is not included. please let me know how and where can I get this package and add it to the current version, any caution on adding this package is highly appreciated. thank you best

I am hoping to get some advise on the following: I am looking for an automatic variable selection procedure to reduce the number of potential predictor variables (~ 50) in a multiple regression model. I would be interested to use the forward stepwise regression using the partial F test. I have looked into possible R-functions but could not find this particular approach. There is a function

So I recognize that: 1. many people hate forward stepwise regression (i've read the archives)--but I need it 2. step() or stepAIC are two ways to get a stepwise regression in R But here's the thing: I can't seem to figure out how to specify that I want the criteria to be Mallow's Cp (and then to subsequently tell me what the Cp stat is). I know it has something to do with

Dear List members I am using the regsubsets function to select a few predictor variables using Mallow's Cp: > sel.proc.regsub.full <- regsubsets(CO2 ~ v + log(v) + v.max + sd.v + tad + no.stops.km + av.stop.T + a + sd.a + a.max + d + sd.d + d.max + RPA + P + perc.stop.T + perc.a.T + perc.d.T + RPS + RPSS + sd.P.acc + P.dec + da.acc.1 + RMSACC + RDI + RPSI + P.acc + cov.v + cov.a +

Dear list members, I've encountered the following problem with the Rcmdr Help menu in the development version of R 2.0.0 under Windows XP ("Version 2.0.0 Under development (unstable) (2004-08-20), ISBN 3-900051-00-3"): The main Commander window has a (tcltk) Help menu with three items, "Commander help", "About Rcmdr", and "Introduction to the R

Hace días escribí......creo que se perdió mi mensaje, voy de nuevo con mi pedido de ayuda... Buenas, soy novata en R, estoy comenzando con RCmdr y quisiera saber si pudieran ayudarme dándome algunas pistas para bajar los paquetes que se necesitan para activar muchas de las funciones que aparecen en la pestaña de Análisis y empezar a aplicar algunos análisis. Yo sé que tal vez se dediquen sólo a

I realize this is basic, but I can't figure out the syntax for setting options for R Commander. I'm running Linux Mint and want to increase the R Commander font sizes. I see that there are (apparently command line) options to do so. I have a desktop launcher with the following command line: sh -c 'R_DEFAULT_PACKAGES="$R_DEFAULT_PACKAGES Rcmdr" R "$@"' Can

El 16/06/15 a las 21:33, eric escribió: > MaLuz, hasta donde entiendo RStudio y R-commander son entornos de > trabajo graficos para R, R-commander no es una libreria > (http://www.rcommander.com/), de modo que me parece raro invocarlo > desde dentro de R. Segun yo deberias llamar a R-commander tal como > llamas a RStudio, como un programa desde la consola linux o con un >

Hi, I have recently installed R on my mac and am trying to install R commander. When I type: install.packages("Rcmdr",dependencies=TRUE) the following message appears I have also tried installing commander via the package installer window. When I do this a large number of error messages (over 50) appear. They are mainly saying that certain dependencies are not available, or that they

Hello, Newbie here, be gentle ;) I have a reference book that discusses regression model selection using several methods - what they call 'Forward Model Selection' i.e. add one variable at a time and examining R, R^2, Mallow's C-p value, etc., 'Backward Model Selection' i.e. starting out with all the variables included and then remove them one at a time, and examining for

Hi In trying to fit a linear model , I use the leaps() function to determine wich predictors I should include in my model. I would like to plot the Mallow's Cp criteria against p with the indexes of selected model variates as points labels Is there already such a function? (I could not find it) Thanks Anne [[alternative HTML version deleted]]

Hi, Is there any package for logistic model selection using BIC and Mallow's Cp statistic? If not, then kindly suggest me some ways to deal with these problems. Thanks. -- View this message in context: http://www.nabble.com/Stepwise-logistic-model-selection-using-Cp-and-BIC-criteria-tf4464430.html#a12729613 Sent from the R help mailing list archive at Nabble.com.

Hola, tengo instalado R y Rstudio sobre linux en máquina virtual. en la consola de Rstudio he instalado el interfaz Rcommander con la instrucción: install.packages("Rcmdr",dependences=TRUE), pero al cargar el paquete library(Rcmdr) obtengo el siguiente error: Loading required package: splinesLoading required package: RcmdrMiscLoading required package: carLoading required package:

I am a Macintosh computer (MAC OS X Version 10.4.3) user. I would like to run R for structural equation modeling and meta-analysis but am having difficulty using the Rcmdr interface. According to the R commander installation notes for Tiger Macs ­ I need to 1) Install X11.app from Apple Install disks ­ which I have done 2) Install R.app ­ which I have done 3) Install binary package rgl from CRAN