similar to: Selecting Best Regression Equation : leaps() in R and stepwise() in S+

Hi, I am tring to write a loop to compute this, ========================== x1=c( rep(-1,4), rep(1,4) ) x2=c( rep(c(-1,-1,1,1),2) ) x3=c( rep(c(-1,1),4) ) x1*x2 x1*x3 x2*x3 ======================== suppose i have x1,x2,x3 i want to compute their ' two factor interactions', x1x2,x1x3 and x2x3, I wrote ======================== for(i in 1:2){ for( j in i+1:3){ xij=c()

Hello I have data like this x1 x2 x3 x4 x5 I want to create a matrix similar to a correlation matrix, but with the difference between the two values, like this x1 x2 x3 x4 x5 x1 x2-x1 x3-x1 x4-x1 x5-x1 x2 x3-x2 x4-x2 x5-x2 x3 x4-x3 x5-x3 x4 x5-x4 x5 Then I

Hello, I have encountered results which I am not sure how to interpret when using anova.gam to compare 2 different models. For certain tests the results do not include an F- or associated p-statistic. This happens when comparing certain models and not others, and I do not discern a patten explaining when the test works and when it does not. Here is some output for some of my tests (y#, x1, and

Dear R-help folks: Here is my platform: > version platform sparc-sun-solaris2.7 arch sparc os solaris2.7 system sparc, solaris2.7 status major 1 minor 5.0 year 2002 month 04 day 29 language R I have a

Hi All, I am trying to convert the following piece of matlab code to R: XX1 = sum(w(:,ones(1,N1)).*X1.*X1,1); #square the elements of X1, weight it and repeat this vector N1 times XX2 = sum(w(:,ones(1,N2)).*X2.*X2,1); #square the elements of X2, weigh and repeat this vector N2 times X1X2 = (w(:,ones(1,N1)).*X1)'*X2; #get the weighted 'covariance'

I'm working on a problem where I'm introducing random error and have been using the built in function runif to provide that random error. However, I realized that I seem to be getting some unexpected behavior out of the function and was hoping someone could share some insight. I don't know the runif algorithm at all, but from the behavior I'm seeing, it seems that whenever I open

If I want to find out the soltion of X1,X2 that min(3X1+2X2+X1X2) subject to 20<=X1+3X2<=50 10<=X1 which function or package can I use? Thanks.

Hi, I guess the answer is negative but I thought I would ask just the same: is it possible to use any of the S+ toolboxes (ARCH and wavelets, more particularly) with R? Thanks, Olivier Lefevre Union Bank of Switzerland New York, NY PS: Please cc me any reply as I am not on the list (at least not yet).

Dear Mr. Cleland, SEM-ueser, R-User, ... there isn't s-plus or R (a GNU-free version of the programming language S) code for structural equation modelling. I always wondered why. I personally think the language S, with the implementations S+ and R, is a good-perhaps the best-environment for statistical analyses. Why? It is object orientated, logical, etc. For example: the code for least

We are looking for an Analytics Consultant to work closely with our TIBCO Spotfire account management and implementation teams as well as our development team to provide analytics expertise within a pre and post sales capacity, proof-of-concept, customer implementation, methodology development and code development to sharpen our current tool kit to name a few. This position will require some

Just found because an old (written for S+) function of mine did label plots wrongly with R. Example --- inspired from example(qqnorm) --- data(precip) qqnorm(precip, ylab = "Precipitation [in/yr] ...") qqnorm(precip, ylab = "Precipitation [in/yr] ...", datax = TRUE) this is all "fine" -- `datax' is a switch that just switches the axes but keeps the

Hello All: In R 1.2.0, one can easily change characters in a string using, for example, the following command, gsub("-"," ",c("1-7-1997","12-21-1997")) [1] "1 7 1997" "12 21 1997" Is there a similar command with S+ 2000? Thank you, ANDREW -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help

Well, R is not S+ nor SPSS. Although it is sort of similar to S+ in terms of how you use it... You can get it from http://cran.r-project.org/ To know more about what it really is, you can get my PowerPoint presentation from: http://www.stat.auckland.ac.nz/~kwan022/pub/R/Introduction/ or and article I wrote from: http://www.stat.auckland.ac.nz/~kwan022/pub/SDK/SAD/Journal/ If you're a

I'm just reading Modern Applied Statistics with S, 4th Ed., Venables and Ribley I'm typing in their examples in both R and S+. I need insight in the difference in the class() statement shown in Chap. 2. Example from book: > names(powers.of.pi) <- -2:2 > powers.of.pi -2 -1 0 1 2 0.1013212 0.3183099 1.0000000 3.1415927 9.8696044 >

This is not a criticism. I'm just curious. Is there an effort to keep R comparable to S+? Or are the two languages diverging? I am doing what probably legions have done before me, and legions will after me...using R on examples from text books written with S+ code. Most of the time everything appears to be equivalent. And then there are amazing divergences in commands. For instance: S:

Hi, I've got the R library "mgcv" for GAM written by Simon Wood which works well in many instances. However, over the years I got attached to the S+ implementation of GAM which allows loess smoothing in more than 1 dimension as well as spline smoothing. Has anyone ported the S+ GAM library to R? Regards, Doug Beare. Fisheries Research Services, Marine Laboratory, Victoria Road,

Our January-February 2008 R/S+ course schedule is now available. Please check out this link for additional information and direct enquiries to Sue Turner [1]sue at xlsolutions-corp.com Phone: 206 686 1578 Can't see your city? Please email us! [2]www.xlsolutions-corp.com/courselist.htm (1) R/S System: Advanced Programming *** San Francisco / January 24-25, 2008

Our June-July 2008 R/S+ course schedule is now available. Please check out this link for additional information and direct enquiries to Sue Turner sue at xlsolutions-corp.com Phone: 206 686 1578 Can't see your city? Please email us! www.xlsolutions-corp.com/courselist.htm (1) R/S System: Advanced Programming *** San Francisco / July 28-29, 2008 *** *** Seattle / July 28-29, 2008

TIBCO Software Inc. today launched TIBCO Spotfire 3.1, the latest version of its in-memory analytics platform, making predictive analytics based on R & S+ accessible within Spotfire's visual user experience. With this release, R & S+ users will be able to share and deploy their scripts through the Spotfire platform, making advanced analytics accessible to Business Analysts. While R

Hi, SolutionMetrics is presenting R and S+ courses in Melbourne & Sydney - November 2012. Introduction to R (1 Day) Introduction to R, Data Import/Export, Data Manipulation, Graphics, Basic Statistical models, writing your own simple functions, efficient programming, avoiding repetitive typing/clicking & file management. More Info<http://bit.ly/VCb1SZ> Date: 19 Nov, 2012 -