search for: wwei

...ondering if it is possible to set parameters of 'rpart' and 'tree' such that they will produce the exact same tree? Thanks. Auston Wei Statistical Analyst Department of Biostatistics and Applied Mathematics The University of Texas MD Anderson Cancer Center Tel: 713-563-4281 Email: wwei@mdanderson.org [[alternative HTML version deleted]]

...3.1 year 2006 month 06 day 01 svn rev 38247 language R version.string Version 2.3.1 (2006-06-01) Auston Wei Research Statistical Analyst Division of Quantitative Science The University of Texas MD Anderson Cancer Center Tel: 713-563-4281 Email: wwei@mdanderson.org [[alternative HTML version deleted]]

...frow=c(2,2)) par(mfg=c(2,1)) hist(rnorm(50),col='blue') par(mfg=c(2,2)) hist(rnorm(60),col='blue') dev.off() Best, Auston Auston Wei Statistical Analyst Department of Biostatistics and Applied Mathematics The University of Texas MD Anderson Cancer Center Tel: 713-563-4281 Email: wwei@mdanderson.org [[alternative HTML version deleted]]

...6 os linux-gnu system i686, linux-gnu status major 2 minor 2.0 year 2005 month 10 day 06 svn rev 35749 language R Auston Wei Statistical Analyst Department of Biostatistics and Applied Mathematics The University of Texas MD Anderson Cancer Center Tel: 713-563-4281 Email: wwei@mdanderson.org [[alternative HTML version deleted]]

Greetings, I am new to R and have some background knowledge about SQL. I'd like to know whether there is a way to manipulate the R datasets (or data frames) using SQL statements. For example, I have two data frames and both of them have a column called "id", then I want to join this two data frames into one. In SQL, we can just simply use the join comment. What should we do in R?

Greetings, I have a data set look like this: > print(MyResult) 2 5 9 10 11 13 mean 6.108394 3.272211e+01 3.951703e+02 2.086217e+03 79.838867 2.592272e+04 median 1.288889 2.743511e+00 4.061491e+00 4.943710e+01 -2.821667 -3.040625e+00 var 2885.350595 2.343144e+05 1.022680e+06 1.200589e+07 365179.508831

Hi, list, The 'tree' package has edit.tree to change split variables by user. Does 'rpart' package have something similar? I couldn't find either in the manual or archive. Thanks in advance. Best, Auston

Hi, List, I am using the package 'gee' downloaded from CRAN several days ago. I tried to do a 2 degree freedom contrast but couldn't get any result. It must be so obvious but I just couldn't get it. Any hint would be greatly appreciated. Here is a sample code: set.seed(123) mydf <-

Hi list, Would someone please give me a hint how to extract the between and within subject StdDev from "lme" fit? Below is the output from the fit, but I couldn't find the number 0.3927714 anywhere in the fitted object. Thanks in advance for your help! Random effects: Formula: ~1 | group (Intercept) Residual StdDev: 0.3927714 0.7857085 Best, Auston