similar to: joining columns as in a relational database

Hi all, Could you please help me? I am trying to understand why this line works: lm1x = lm(y~X-1, tmp) Here it seems that I was combining the design matrix and the data frame... And X below is not a single column, in fact, it's a bunch of columns in matrix form... I don't understand why this line works... Is it just luck, i.e. if we change the data-set and/or formulas to something

Dear r-devel list members, Dirk Eddelbuettel brought the following problem to my attention. The code is abstracted from the appendix on mixed models from my R and S-PLUS Companion: > set.seed(12345) # for reproducibility > library(nlme) Loading required package: lattice > data(MathAchieve) > data(MathAchSchool) > attach(MathAchieve) > mses <- tapply(SES, School,

Dear R list members, I've turned up a strange discrepancy between results obtained from the lme function in the nlme package in R and results obtained with lme in S-PLUS. I'm using version 3.1-24 of nlme in R 1.4.1 under Windows 2000, and both S-PLUS 2000 and 6.0, again under Windows 2000. I've noticed discrepancies in a couple of instances. Here's one, using data from Bryk

I'm looking at Pinheiro & Bates "Mixed-Effects Models in S and S-PLUS" at the moment. Several datasets are used, one of which is called "PBIB" (a partially balanced incomplete block design). All the other datasets can be found somewhere or other in R. However, I cannot locate PBIB, and it does not seem to be mentioned in the latest edition of the R Full Reference

Buenas noches, mi pregunta es tal vez sencilla. tengo esta libreria y estos datos library(nlme) data(MathAchieve) Infoest = MathAchieve en esta base quiero contar la cantidad de casos en la que la columna Sex, toma el valor Female, como puedo hacerle el filtro para ver solo los Females. y como puedo dentro del mismo conjunto de datos agregar la variable numerica que me cuente 1 si es Female y 0

I'm making some illustrations and it would be convenient to automatically shade the overlapping portions of circles. These illustrations are for Social Choice theory, a field in political science and economics. I've wrestled together some examples so you can see what I mean, but have not mastered the "color overlapping sections" problem (as you will see):

Downloaded wine from codeweavers and tried to install with Kpackage. "Needs libXv.so.1" Tried locating lib* with Google, but Google comes up with packages with different names. Maybe the lib I need is part of a larger library. So, where to find what I need, and then what to do with it (eg. just copy to /lib)?? Thanks in advance for clues, dave

Hola Alexander. Para filtrar y obtener el subconjunto que necesitas, puedes hacerlo de la siguiente (una de ellas) manera: > Female <- subset(MathAchieve, subset=Sex=="Female") Crear una nueva variable recodificando "Sex" puedes hacerlo así: > Sex_recode <- Recode(MathAchieve$Sex, '"Female"=1; "Male"=0; ;', as.factor.result=TRUE) >