[R] Computing Median for Subset of Data

>From my larger data set I created a subset of it by using:  subset_1 <- subset(timeuse, IndepTrans = 1, Physical = 1) where my larger data set is "timeuse" and the smaller subset is "subset_1". The subset was conditioned on "IndepTrans" equaling "1" in the data and "Physical" equaling "1" as w

[R] Gwet's AC1

R has functions for computing kappa, fleiss's kappa, etc., but can it compute Gwet's AC1? Thanks, Matt. [[alternative HTML version deleted]] __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read t

[R] Factor Analysis/Inputting Correlation Matrix

Can someone please direct me to how to run a factor analysis in R by first inputting a correlation matrix? Does the function "factanal" allow one to read a correlation matrix instead of data vectors? Thanks, Matt. [[alternative HTML version deleted]]

[R] Prediction Intervals vs. Confidence Bands

When I ask R to compute: predict(data, int = "c"), following a linear regression, what is it computing exactly? How are these lower and upper "prediction" limits different than what I would get for confidence limits? Thanks, Matt. [[alternative HTML version deleted]] __

[R] Book on R's Programming Language

Can someone please recommend to me a book on the programming language that R is based on? I'm looking for a foundational book that teaches the logic of the S language. It seems that knowing the underpinnings of the language can only make using R a bit easier. Any leads are greatly appreciated